The explosion took place at the Mozhaysky Military Space Academy in St Petersburg.
An explosion was reported in the Swedish capital of Stockholm in the early hours of Wednesday morning, injuried several people
One person was injured after a bus exploded in central Stockholm, Sweden, on Sunday
At least 25 people were killed and 50 injured in the accident, state television reported.
The device detonated near a courthouse on Saturday evening. No one was injured.
The explosion was caused by illegal taps in the pipeline, authorities said.
At least 21 killed and many injured in blast
Authorities said 39 people died after an apartment block collapsed in Russia
Aliens over New York? No, the blue lights were due to an explosion at a power station in Queens. The incident sparked speculation on Twitter
A bomb explosion ripped through the offices of a Greek TV station in Athens early on Monday morning.
A suicide car bomb attack in the Somali capital Mogadishu kills three soldiers and injures another 14 people including six children
Nearly 2,000 people are evacuated from nearby homes as a fire engulfs the Bayernoil facility
Two lorries collided on the motorway near Bologna airport in northern Italy on Monday, causing a major explosion and killing at least two people, according to Italian news agency ANSA.
Footage from state television channel CCTV shows a huge fire and plumes of smoke rising from the industrial park in southwestern province of Sichuan.
At least 24 people have been killed and 40 injured after a fireworks explosion just outside Mexico City on Thursday. The first explosion happened after a fire broke out at a fireworks factory.
A number of people have been injured after an explosion in an apartment building in western Germany.
An explosion rocked a stadium in Zimbabwe where President Emmerson Mnangagwa was addressing a rally on Saturday.
New Prime Minister Abiy Ahmed said it was an unsuccessful attempt by forces who do not want to see the country united
Over 90 people were wounded. An investigation is now underway after an ammunition cache was detonated
Dozens are killed or injured in an explosion at a weapons depot in central Baghdad