Sky Harbor Airport's Terminal 4 has reopened after a lengthy investigation into a rental vehicle that was left unattended Sunday morning.
Airport spokesman Greg Roybal said at 11:20 a.m. that operations were returning to normal, but passengers and people picking up travelers should continue to check with airlines.
According to Phoenix police Sgt. Tommy Thompson, the rental vehicle was found around 7 a.m. in a curb lane on the upper deck of Terminal 4.
An airport spokeswoman says the pre-security area in the east side of Terminal 4 was evacuated and three of the four security checkpoints at the terminal have also been closed.
The Sky Train also has stopped dropping passengers off at the terminal as authorities investigated the situation.