The school attended by murdered children Yuna and Minu Jo says it's shocked and saddened the Ministry of Education did not report their disappearance to police.

Deputy Prime Minister David Seymour says his focus is on issues facing Kiwis - not on joining the chorus to remove Andrew Mountbatten-Windsor from the line of succession.

Iranian students have defied authorities with protests for a third day, weeks after security forces crushed mass unrest and as the US weighs possible air strikes against the Islamic Republic.

Former British ambassador to the US Peter Mandelson has been arrested by London police on suspicion of misconduct in public office, following revelations over his ties to convicted sex offender Jeffrey Epstein.