LAS VEGAS (AP) - Las Vegas police say one suspect is 'down' after a shooting at country music festival. Authorities are searching for a 'companion' who they said is a person of interest.

Police reported more than 20 people were killed and over 100 injured in the shooting.

Police believe there is only one shooter.

Flights in and out of McCarren airport were temporarily halted as a result of the shooting situation. Authorities also shut down part of the Las Vegas Strip.

*This story is developing and will be updated.

LAST UPDATED: 1:40 a.m.