Two service members were killed and a third was in "serious" condition after the vehicle they were in crashed near the U.S.-Mexico border in New Mexico, military officials said Tuesday.

Another service member was seriously wounded, the military said. The cause of the accident is under investigation.

Two U.S. service members were killed, and a third was seriously hurt, in a “vehicle accident" near the U.S.-Mexico border, officials said. Here's what we know.