Engineer Vangelis Matragos explains what can go wrong when construction happens next to older buildings

Engineers say a rare chain of errors, plus the neighboring lot's demolition, likely caused the building to collapse

Five people, including engineers, a contractor, and a property owner, have been arrested as investigators examine whether nearby construction work caused a four-story apartment building to collapse in Athens' Petralona neighborhood

Haris Doukas says the city will provide emergency cash payments and temporary housing to impacted residents, as rescue crews comb the rubble of the four-story block that came down in central Athens.

The cause is still unknown, but reports suggest renovation work was underway at the neighboring building