Varsity Aerial operations, which were already in operation in parts of the Bronx and Brooklyn, were ordered temporarily halted in the city on Tuesday after two major explosions rocked an airfield in the Bronx.

The New York City Fire Department tweeted that two explosions occurred shortly after 10:30 a.m. local time at the Brooklyn Airfield, which serves as a training hub for firefighting and other aviation units.

One blast caused damage to a nearby building, but there was no immediate indication that anyone was killed.

The second explosion occurred at 10:45 a.meters east of the Brooklyn airport.

“It is currently under investigation as to the cause of the explosion,” the department tweeted.

“It appears that the blast was an aerial vehicle explosion.

No injuries were reported.

The cause of both explosions is under investigation.”

New York Governor Andrew Cuomo declared a state of emergency, which meant the city would begin the process of cleaning up air quality.