document: In the World Brain swelling tied to bear death BERLIN - The Berlin zoo 's celebrity polar bear , Knut , drowned after swelling of his brain caused him to collapse and fall into his enclosure 's pool , experts said Friday . A necropsy of the four-year-old bear who died suddenly two weeks ago showed he was suffering from encephalitis , an irritation and swelling of the brain that was likely brought on by an infection , pathologist Claudia Szentiks said . It remains unclear what that infection was , but Achim Gruber , a professor of veterinary medicine at Berlin 's Free University , said it likely was a virus . Knut , who was born at the zoo , quickly rose to celebrity status as an irresistibly cute cub who had been rejected by his mother . Knut died March 19 in front of hundreds of visitors , turning around several times and then falling into the water in his enclosure . Experts who examined Knut found large quantities of fluid in his lungs , supporting the conclusion that the immediate cause of death was drowning . But they said that even if he had n't fallen into the water he likely would n't have survived . - AP Suicide bomber kills 3 in Fallujah BAGHDAD - A suicide bomber disguised as a street cleaner walked up to soldiers outside a mosque and blew himself up Friday , killing two of the troops and a worshiper in a western Iraqi city that was once an al-Qaeda in Iraq hotbed . The blast wounded six people , including four soldiers who were stationed outside the Fallujah mosque to protect worshipers , according to a senior city police official . The unit 's commander , an army colonel , was among the dead , the official said . Also Friday , about 65 people were wounded in a demonstration in the Kurdish city of Sulaymaniyah when protesters demanding jobs and better services began hurling stones at security forces . City health official Rekard Rasheed said at least 38 of the injured were policemen . - AP Anarchist group claims bombings ATHENS , Greece - An Italian radical anarchist group has claimed responsibility for three mail-bomb attacks on a Greek prison , an office of the Swiss nuclear power industry , and an Italian military barracks , authorities said Friday . Two of the bombs exploded , injuring two people in Switzerland and one in Italy , while officials at the maximum-security Korydallos prison in Athens defused the third device Thursday . Greek police said the Informal Anarchist Federation , or FAI , expressed solidarity with suspected radical anarchists in prison in Greece , Switzerland , Chile , and Germany , in a proclamation found inside the parcel . - AP Elsewhere : The Israeli military said Friday that its aircraft had attacked a group of Palestinians in Gaza it says was planning to abduct Israelis . A military spokeswoman said the group was plotting the attacks for the Jewish festival of Passover later this month , in Israel as well as in the popular Egyptian resort of Sinai . Gaza Health Ministry spokesman Adham Abu Salmia said three men were killed .
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