(Adds quote from PM, background on explosion, Russian reaction)
PRAGUE, April 17 (Reuters) - The Czech Republic is expelling 18 Russian diplomats over suspicions that Russian intelligence services were involved in an ammunition explosion in 2014, Prime Minister Andrej Babis and Foreign Minister Jan Hamacek said on Saturday.
"There is well-grounded suspicion about the involvement of officers of the Russian intelligence service GRU, unit 29155, in the explosion of ammunitions depot in the Vrbetice area," Babis told a briefing shown live on television.
Several explosions shook the Vrbetice ammunition depot, 330 km southeast of Prague, on Oct. 16, 2014. The explosions killed two employees of a private company that was renting the depot from a state military organisation.