Three people were injured in an explosion inside an elite military academy in Russia’s second-largest city, Russia’s Defense Ministry said on Tuesday.

The ministry said in a statement that an unidentified “object” went off early afternoon inside the prestigious Mozhaisky Academy in St. Petersburg, which trains officers for the army’s missile defense unit. Three people suffered non-life-threatening injuries.

Authorities did not give other details.

Soldiers guard an entrance as an ambulance drives into the Alexander Mozhaysky Military Space Academy in St. (AP Photo/Dmitri Lovetsky)
Soldiers guard an entrance as an ambulance drives into the Alexander Mozhaysky Military Space Academy in St. (AP Photo/Dmitri Lovetsky)

Several windows were shuttered on the second floor of the building, and dozens of cadets were being led out of the gated compound.

A local news website, Fontanka, reported that the blast was caused by an improvised explosive device with an equivalent of 200 grams of TNT.

A soldier guards an entrance while students evacuate from the Alexander Mozhaysky Military Space Academy in St. (AP Photo/Dmitri Lovetsky)
A soldier guards an entrance while students evacuate from the Alexander Mozhaysky Military Space Academy in St. (AP Photo/Dmitri Lovetsky)
Military students evacuate from the Alexander Mozhaysky Military Space Academy in St. Petersburg, Russia, Tuesday, April 2, 2019. (AP Photo/Dmitri Lovetsky)
Military students evacuate from the Alexander Mozhaysky Military Space Academy in St. Petersburg, Russia, Tuesday, April 2, 2019. (AP Photo/Dmitri Lovetsky)
Servicemen walk in front of the Alexander Mozhaysky Military Space Academy in St. Petersburg, Russia, Tuesday, April 2, 2019. (AP Photo/Dmitri Lovetsky)
Servicemen walk in front of the Alexander Mozhaysky Military Space Academy in St. Petersburg, Russia, Tuesday, April 2, 2019. (AP Photo/Dmitri Lovetsky)
An ambulance drives out from the Alexander Mozhaysky Military Space Academy in St. Petersburg, Russia, Tuesday, April 2, 2019. (AP Photo/Dmitri Lovetsky)
An ambulance drives out from the Alexander Mozhaysky Military Space Academy in St. Petersburg, Russia, Tuesday, April 2, 2019. (AP Photo/Dmitri Lovetsky)

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