At least two powerful explosions rocked an area used for Russian Navy drills in the Far East Primorye region, the local branch of Russia’s National Antiterrorism Committee (NAC) said Friday.

The blasts occurred early in the morning in Desantnaya Bay, located around 12 kilometers (7.5 miles) east of the regional capital Vladivostok, the NAC said. Authorities reported no casualties or damage.

“The threat has been neutralized by law enforcement agencies,” the NAC said in a statement, without providing further details.

Later, the agency said the explosions were caused by the ignition of propane cylinders inside a vehicle at the bay.

Local media shared video footage showing two trucks transporting passenger vehicles covered in tarps away from the scene.