Belgian Prime Minister Charles Michel on Wednesday said the country's terror alert would stay at the second-highest level, a day after a deadly police raid linked to the Paris Attacks.

Michel told a press conference that the OCAM national crisis centre "maintains its level three alert level, which means a threat is possible and likely".

Belgium raised the alert to the top level of four because of a terror threat shortly after November's attacks in Paris, but lowered it to three at the end of November.