The 22-year-old attacked his former school in northern Slovakia, killing the deputy director and injuring five, before he was shot dead by police.
The fire department said one person was still missing after the explosion.
Lack of physical activity in adolescence can impact health, as well as cognitive development and sociability.
A crash between a truck and passenger bus killed at least 13 people in western Slovakia on Wednesday and injured many others, Slovak fire and rescue services said.
Slovakia’s far right have been edging upwards in the polls, with around 14% of the vote, only 5% behind the ruling social-conservative Direction-Social Democracy (Smer-SD) party.
Slovakian politicians who voted to restrict the law on the singing of foreign national anthems in public have said the result was a "mistake" and that they didn't realise what they were voting for.
Anti-corruption lawyer Zuzana Caputova was propelled to power by revolt over the murder of a journalist.
The lawyer and anti-graft campaigner, Zuzana Caputova, is set to win Slovakia's presidential election.
Protesters used the anniversary of communism’s fall to call for change to Slovakia’s political culture.
Three people in Slovakia have been charged with the murder of an investigative journalist and his fiancée.