David Cameron will discuss guns and gangs when he meets police and city officials in Los Angeles.
The Conservative leader is on a three-day visit to the west coast of America and on Thursday discussed ways to tackle crime with California Governor Arnold Schwarzenegger.
He said the meeting with Mr Schwarzenegger at his offices in Sacramento went "extremely well" and the pair were looking at ways of working together in the future.
Mr Cameron said the issue of guns and gang crime were key factors of the hour-long meeting.
"We had a long conversation about crime because really the principle reason I'm here, apart from the Google speech I've made, is to look at the issue of guns and gangs," he said.
"So we've been talking a lot about penal policy, about gangs, about prison reform and rehabilitation."
He added: "We had a long discussion about the environment and all the things he's doing in California and some of the policy issues we've been facing in the UK."
Asked how they might work together, Mr Cameron said: "We're talking about ways we might hook up in the future, but I can't be more specific than that."
Earlier, in Mountain View, San Francisco, Mr Cameron used a speech at the Google Zeitgeist conference to call for Government-held data to be released so local communities could develop their own, alternative public services.
