About 53 miles outside of New York City, FBI agents were working with state and local authorities to track down a group that had robbed a series of banks in central New Jersey. Yesterday afternoon, during a confrontation with the automatic weapons-carrying robbers outside a PNC Bank in Readington, NJ, an FBI agent was killed by gunfire. And it seems the gunfire was from other federal agents.

The FBI only confirmed that 52-ear-old Special Agent Barry Lee Bush had died and that "preliminarily, information suggests the agent may have been fatally wounded as a result of the accidental discharge of another agent's weapon during a dynamic arrest situation." According to the Daily News, Bush was in a car that was trying to block a suspect, and an agent getting out of another vehicle "accidentally" fired his rifle. The bullet hit Bush in the armpit, where the bulletproof vest did not protect him.

The authorities managed to arrest two of the robbers, but they are still looking for a third robber, Francisco Herrera-Genao, who is considered armed and dangerous. The men frequently fired their assault weapons into the ceilings of banks, which led to the presence of a SWAT team, and after the shooting, hundreds of law enforcement officials swarmed the surrounding area to find Herrera-Genao.

Bush is the first FBI agent killed since September 11, 2001 and the first to be fatally shot in 10 years. He testified in the trial of Al Qaeda's 1998 bombing of the American Embassies in Kenya and Tanzania as well as the trial of anti-abortion activist James C. Kopp.

Photograph of FBI agents looking for evidence by Mel Evans/AP