From News 24:

A US drone strike in Abyan province, southern Yemen, killed 4 suspected Al Qaeda members. The missiles hit 2 vehicles killing the passengers inside.

From Channel News Asia:

Abyan is one of the provinces in Yemen where Al Qaeda is suspected to be operating. The drone strike happened around midnight on Tuesday and left the car, with all four people inside, completely charred. Residents reported also hearing missiles in another area, but casualties are unknown.