News brief: Big stories of the day

Gibraltar on Sunday rejected a US demand to seize an Iranian oil tanker at the centre of a diplomatic dispute as it prepared to leave the British overseas territory after weeks of detention.

The Islamic State group on Sunday claimed responsibility for a suicide attack on a wedding in Kabul which Afghan authorities said killed at least 63 people.

Russia will not deploy new missiles as long as the United States shows similar restraint in Europe and Asia, Russian defence minister Sergei Shoigu said on Sunday, after Washington's withdrawal from a Soviet-era arms pact.

The presence of America and Britain in the Gulf region brings insecurity, the head of the Iranian Revolutionary Guards navy, Alireza Tangsiri, was reported as saying by the ILNA news agency.

People in the city of Shenzhen, which borders Hong Kong, said on Sunday (August 18) that they thought China's paramilitary presence in a stadium there would only be called as a last resort.