Police hunting for Michael Cope over the murder of his ex-girlfriend Linzi Ashton urged him to give himself up.
Superintendent Kevin Mulligan warned: "If anyone is harbouring this individual, they will be prosecuted."
He added that Cope had a "history of violent behaviour".
More top news
The explosions at the site were supposed to build confidence ahead of a summit between Kim Jong Un and Trump, which has been cancelled.
The Oscar-winning actor is facing allegations from multiple women, according to CNN.
In a letter to Kim Jong-un, Mr Trump blamed the dictator’s ‘tremendous anger and open hostility’ for his decision, but left the door open fo