Two people have been killed after a vehicle was driven into pedestrians on the busiest street in the center of Stockholm, according to the Swedish Security Police.

Parliament and the Stockholm subway are in lockdown, a Swedish Security Police spokesman told Swedish public radio.

“Some kind of vehicle has been driven into a street full of pedestrians,” Swedish Police spokesman Lars Vilstrom told CNN Friday. “We have a lot of police officers on the scene. We don’t have numbers yet,” he said.