Three explosions were reported Tuesday at a military testing ground in Russia's Orenburg region, some 1,500 km south to Moscow.

According to the press service of the Russian Defense Ministry, there were no casualties in the triple blasts.

Preliminary information showed that the first explosion occurred at the Dongus firing range at around 09:55 Moscow time (0555 GMT), when munitions were unloaded from a train. The explosion triggered the other blasts and a fire at the site.

After the blasts, servicemen were quickly evacuated to a safe distance and there were no casualties, the press service said, adding that residents in two towns near the accident site have also been evacuated.

The Central Military District in charge of the testing ground said that firefighters were on standby to extinguish the fire only after there were no more explosions.

"The situation is being monitored by reconnaissance and mine-sweeping groups," spokesman Yaroslav Roshchupkin told reporters.

Latest reports said the explosions have ceased and the accident posed no threats to local residents.

The Defense Ministry has already sent an investigation commission to the Dongus firing range, some 40 km to Orenburg, the administrative city of Orenburg region.

It was not the first ammunition blast at military facilities in Russia in the past years.

On Sept. 26, an officer was killed by an ammunition blast at the Totsky range, 180 km northwest to Orenburg.

On May 30, three servicemen were injured in a blast at a military range in Russia's Far East Khabarovsk Territory.

In last June, fire and blasts rocked a Defense Ministry depot in Udmurtia, leaving at least three people killed and at least 95 people injured.