4 Americans missing after they were kidnapped in Mexican border city, FBI says

Four U.S. citizens were kidnapped after gunmen opened fire on their vehicle in the northern Mexico border city of Matamoros, the FBI said Sunday.

The four had entered Matamoros, across from Brownsville, Texas, on Friday, in a white minivan with North Carolina license plates, the agency said.

The FBI San Antonio Division office said the vehicle came under fire shortly after it entered Mexico.