A small explosive device, possibly a grenade, was thrown against the front wall of PCM Publishers’ print shop on the Van der Madeweg in Amsterdam, just after midnight. No-one was injured but several windows were broken. Bomb experts are trying to find out what caused the explosion.

News agency ANP has received an email from an organisation calling itself Rara and claiming responsibility. Rara was active in anti-apartheid campaigns in the 1980s.