The danger is especially acute in the Drina River valley of both Bosnia-Herzegovina and Serbia. Travel in the border regions may be especially perilous. Demonstrations, sometimes violent, can occur without warning. In recent months, there have been several armed attacks on Serbian police, resulting in death and injury. Security forces are at a high state of alert and police check points are widespread.
Travelers are routinely subject to police search and interrogation.
There have been recent incidents of both cargo and passenger ships on the Danube transiting Serbia being delayed for several days by purported private organizations protesting U.N. sanctions. Persons traveling on the Danube through Serbia should be prepared for delays and alterations to their plans. The potential for violent incidents exists and will probably increase as a result of the political situation and worsening economic conditions. For example, a bomb was detonated in front of the U.S. Embassy in Belgrade in 1993, causing some damage. Many medicines and basic medical supplies as well as X-ray film often are unavailable.