Fifty migrants found dead inside abandoned Texas trailer truck

Mexican foreign minister mourns huge tragedy' as US investigates effort to smuggle people across border

• San Antonio: what we know about the trailer truck deaths

Fifty suspected migrants were found dead and at least a dozen others were hospitalized after being found inside an abandoned tractor-trailer rig on Monday on a remote back road in south-west San Antonio, officials have said.

The discovery in Texas may prove to be the deadliest tragedy among thousands of people who have died attempting to cross the US border from Mexico in recent decades.