Put Voyager on a twenty-four hour tactical alert.

The Los Angeles Police Department said on Twitter it had declared a "citywide tactical alert.

But there is an increased police presence at theaters across the country, including New York City and Los Angeles, where officers are on a "tactical alert.

The LAPD said it was on "tactical alert due to a major incident" at the airport and the fire department said they were assisting at a multi-patient incident.