Two men have been charged by Belgian police investigating the 22 March Brussels bombings, after they were linked to a safe house said to have been used by two of the attackers.

Prosecutors identified the men as Smail F and Ibrahim F. Local reports said they were brothers. Three suicide bombers killed 32 people at Brussels international airport and Maelbeek metro station. Two other suspected bombers were arrested in a police raid last Friday.

According to the prosecutors, Mohamed Abrini has confessed to being he “man in the hat” – the third airport bomber who fled without detonating his device. Swedish national Osama Krayem is thought to have been a man spotted with metro bomber Khalid el-Bakraoui before the Maelbeek attack.

Smail F and Ibrahim F were apparently arrested a day later and one of the brothers is thought to have rented a house in the central Etterbeek area of Brussels used by Osama Krayem and el-Bakraoui before the metro bombing.

The house in Avenue des Casernes was raided on Saturday but no explosives or weapons were found. “They are charged with participation in the activities of a terrorist group, terrorist murders and attempts to commit terrorist murders, as a perpetrator, co-perpetrator or accomplice,” prosecutors said in a statement.