A police officer stands at a cordon after police arrested a man carrying a knife outside Buckingham Palace in London, August 25, 2017.

:: Police investigating Friday’s sword attack outside Buckingham Palace in London arrested a second man on Sunday, a statement said.

“The man was arrested on suspicion of being involved in the commission, preparation or instigation of terrorism at 10:15hrs (0915 GMT) today and he has been taken into custody,” the statement said.

Police added that the 30-year-old man was arrested at an address in West London.

Late on Friday, a man deliberately drove at a police van close to the Queen’s official residence in London and was detained by three police officers, who sustained minor injuries.

The 26-year-old arrested at the scene remains in custody after a warrant for his detention until September 1 was granted, the police said.