New Zealand police said on Tuesday a man was arrested and bomb disposal officers found a package with a suspected explosive device at a vacant property in Christchurch, where 50 people were killed in attacks by a lone gunman on two mosques in March.Police cordoned off streets in the Phillipstown area of the city on New Zealand’s South Island, with a bomb disposal team, ambulance and fire and emergency crews sent to the scene.“Police have located a package containing a suspected explosive device and ammunition at a vacant address ... in Christchurch,” district police commander Superintendent John Price said in a statement.An explosives disposal unit rendered the package safe and a 33-year-old Christchurch man was arrested, the statement said. The police cordon was later lifted.The New Zealand Herald said police were called due to “threats about an explosive device”.