The latest incident happened a week ago in Garissa, a town near the Somali border, when gunmen opened fire at a hotel, killing six.
He and a U.N. colleague were traveling through a remote stretch of southwestern Niger, near the Mali border, when gunmen forced them from the road in 2008.
Between Basra and the Kuwaiti border Friday, gunmen fired on jeeps carrying Portuguese journalists, wounding one reporter and kidnapping another, Portuguese media reported.
In Chihuahua State, which borders Texas, gunmen killed Officer José Martínez, the head of criminal investigations for the southern half of the state, as he left his home in the city of Parral on Monday morning, the state attorney general's office said.
The economic problems that began when rebels seized border villages and gunmen started kidnapping travelers have worsened: lucrative fuel smuggling has dropped off.
Israel has torn down homes close to the border that the gunmen were using for cover, as well as houses that had weapons-smuggling tunnels linked to Egypt.
Ms. Julin and her husband, Mark Rich, were missionaries living in a remote village just miles from the Colombian border when the gunmen — leftist rebels from the Revolutionary Armed Forces of Colombia, or FARC — descended on the village.
He was willing to testify after having been repeatedly shot in his car at a United States border crossing by gunmen he believed were sent by the Arellano Felix group.
In Rafah, in the southern Gaza Strip along the border with Egypt, Palestinian gunmen and Israeli troops have waged almost daily gun battles in recent years.
Russian border guards killed six gunmen who were trying to cross from Afghanistan late on Tuesday.
