Restrictions have been lifted at Terminal 4 at Sky Harbor International Airport after police investigated a suspicious item as a precaution.
Airport officials closed A and D checkpoints while authorities investigated the item.
An American Airlines spokesperson said that they were holding flights departing for Phoenix while police took a look at the item in question.
Ticket counters for Southwest Airlines and American Airlines were also shut down for more than an hour.
Airport officials say flight delays are expected; travelers are advised to check their flight status with their airline before arriving at the airport.
It is unclear what the item in question was.
— ABC15 Arizona (@abc15) November 8, 2017