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 bloc has also launched a public consultation on salary transparency to get companies to open up on what they pay their employees.
The fire department said one person was still missing after the explosion.
Thirty years after November 17, 1989, the Czech Republic sees perhaps the largest commemoration of the Velvet Revolution this Sunday. One of the commemorative events was video mapping at Narodni street in Prague.
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.
Following elections in Ukraine and Slovakia over the weekend, two unlikely candidates have made their way to the top of the polls.
Watch Monday night's full episode of Raw Politics.
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.
Voters have had enough of the ruling Smer party and just last year there mass protests broke out after a journalist was assassinated.