A bomb strikes near the Athens offices of the Greek railway company. No injuries reported

ATHENS, Greece — A bomb planted near the offices of Hellenic Train, Greece's main railway company, exploded Friday night in a busy district of central Athens, authorities said. There were no reports of injuries.

The explosion comes amid widespread public anger over a 2023 railway disaster, Greece's worst, in which 57 people were killed and dozens more injured when a freight train and a passenger train heading in opposite directions were accidentally put on the same track.

Local media said a newspaper and a news website had received an anonymous call shortly before Friday's blast, with the caller warning that a bomb had been planted outside the railway company offices and would explode within about 40 minutes.

In a statement, Hellenic Train said the explosion had occurred ''very close to its central offices'' and said the blast had caused limited damage and no injuries to any employees or passers-by.

It said authorities had acted immediately upon receiving information about the warning call, and that the company was cooperating fully with authorities and ensuring the safety of its staff.

Police cordoned off the site along a major avenue in the Greek capital, keeping residents and tourists away from the building in an area with several bars and restaurants. Officers at the scene said a bag containing an explosive device had been placed near the Hellenic Train building on Syngrou Avenue.

Police forensics experts wearing white coveralls were collecting evidence at the scene.

Criticism over the government's handling of the Feb. 28, 2023 collision at Tempe in northern Greece has mounted over the last few weeks in the wake of the second anniversary of the disaster, which killed mostly young people who had been returning to university classes after a public holiday.

The crash exposed severe deficiencies in Greece's railway system, including in safety systems, and has triggered mass protests - led by relatives of the victims - against the country's conservative government. Critics accused authorities of failing to take political responsibility for the disaster or holding senior officials accountable.

So far, only rail officials have been charged with any crimes. Several protests in recent weeks have turned violent, with demonstrators clashing with police.

Earlier Friday, a heated debate in Parliament on the rail crash led to lawmakers voting to refer a former Cabinet minister to judicial authorities to be investigated over alleged violation of duty over his handling of the immediate aftermath of the accident.

Hellenic Train said it ''unreservedly condemns every form of violence and tension which are triggering a climate of toxicity that is undermining all progress.''

Greece has a long history of politically-motivated violence dating back to the 1970s, with domestic extremist groups carrying out small-scale bombings which usually cause damage but rarely lead to injuries.

While the groups most active in the 1980s and 1990s have been dismantled, new small groups have emerged. Last year, a man believed to have been trying to assemble a bomb was killed when the explosive device he was making exploded in a central Athens apartment. A woman inside the apartment was severely injured. The blast had prompted Minister of Citizen Protection Michalis Chrisochoidis to warn of an emerging new generation of domestic extremists.