TASK DEFINITION: In this task, you are given news articles and you need to generate a highlight, i.e., a short summary, with a maximum length of 10 lines.
PROBLEM: Seoul, South Korea (CNN) -- South Korean marines detained an American man on the bank of a river bordering North Korea late Tuesday, according to a South Korean Defense Ministry official and a senior U.S. State Department official. The marines were on a regular patrol mission west of Seoul when they caught the man by the Han River in an area where it divides North and South Korea. The U.S. citizen was being interrogated Wednesday, the defense ministry official said, adding that it was not immediately known whether the American was trying to cross into North Korea. The U.S. Embassy in Seoul said it was "aware of the reports that a U.S. citizen has been detained attempting to swim from South Korea to North Korea." The Embassy said it had been in contact with South Korean authorities but didn't have any additional information to share. Americans are allowed to travel to North Korea, usually arriving by plane from Beijing. But it's forbidden to cross from South Korea into North Korea. The U.S. State Department warns citizens against all travel to the authoritarian state led by Kim Jong Un. Three U.S. citizens are currently in detention in North Korea: Kenneth Bae, Matthew Todd Miller and Jeffrey Fowle. A North Korean court on Sunday sentenced Miller to six years hard labor for committing "acts hostile" to North Korea, although the circumstances surrounding his alleged crime remain murky. Bae, a Korean-American missionary, is serving a 15-year sentence for allegedly trying to bring down the North Korean government. Fowle, who was arrested in June while traveling as a tourist, is still awaiting trial. Fast facts on detained Americans . CNN's K.J. Kwon reported from Seoul, and Jethro Mullen from Hong Kong. CNN's Paula Hancocks, Elise Labott and Josh Levs contributed to this report.

SOLUTION: NEW: U.S. Embassy says it's aware of reports the man was trying to swim to North Korea .
A South Korean official says not immediately clear if the man was attempting to cross the border .
He was caught on the bank of the Han River where it divides the two Koreas .

PROBLEM: (CNN) -- Alleged Boston crime boss James "Whitey" Bulger may have authored two memoirs, one of which was titled "My Life in the Irish Mafia," according to court documents. It is not clear whether the notorious fugitive, who evaded authorities for 16 years, actually wrote the memoir, but prosecutors say it is part of their investigation. The manuscript was seized at a South Boston home on January 5, 1995, the same day a warrant was issued for Bulger's arrest on racketeering charges. The alleged gangster also apparently penned a separate autobiography that was found by authorities at Bulger's Santa Monica, California, apartment after his arrest there, courts documents say. Bulger, 82, has pleaded not guilty to all charges against him, including 19 murder counts. Once one of the FBI's 10 most wanted fugitives, he is currently being held without bail and faces an impending racketeering indictment after authorities tracked him down in June 2011 at his California home. Bulger was arrested after being lured out of his apartment with an FBI ruse: He apparently received a phone call and was told his lock box, located in the basement parking lot of his building, had been broken into. When Bulger went down to check, FBI agents arrested him. His alleged barbarity as an Irish-American mobster in Boston inspired the Jack Nicholson character in Martin Scorsese's 2006 film "The Departed." CNN's Chuck Johnston and Jack Maddox contributed to this report .

SOLUTION: James "Whitey" Bulger may have inked two memoirs .
One of the memoirs is called "My Life in the Irish Mafia," prosecutors say .
A separate autobiography was found at his California apartment .
Bulger, 82, has pleaded not guilty to all charges against him, including 19 murder counts .

PROBLEM: Tokyo (CNN) -- Japan's Ministry of Health, Labor and Welfare is investigating a report that workers at the damaged Fukushima Daiichi nuclear power plant were told to use lead covers in order to hide unsafe radiation levels, an official said. The alleged incident happened December 1, nine months after a major earthquake and tsunami ravaged northern Japan and damaged the plant. "We'll firmly deal with the matter once the practice is confirmed to constitute a violation of any law," said the ministry official, who could not be named in line with policy. An official with the plant's operator, TEPCO, said the company received a report of the alleged incident Thursday from subcontractor Tokyo Energy & Systems. The report said a second subcontractor, Build-Up, created the lead covers and ordered workers to use them over their dosimeters, pocket-size devices used to detect high radiation levels. The TEPCO official could also not be named in line with policy. Tokyo Energy & Systems said in its report that the workers never used the covers, the TEPCO official said. Japan's Asahi Shimbun newspaper, however, reported Saturday that while some workers refused the orders to use the lead covers, nine others did use them for several hours. The newspaper's report cited plant workers, who described the lead covers as fitting snugly over the dosimeters inside the breast pockets of the workers' protection suits. TEPCO told CNN it ordered Tokyo Energy & Systems Inc. to conduct an investigation and is awaiting a reply. CNN's Junko Ogura contributed to this report.

SOLUTION:
The incident allegedly happened at the damaged Fukushima Daiichi plant .
The government and plant operator investigating the report .
Report: Workers were told to covers devices used to detect radiation levels .