Salt Lake Police Department negotiators - backed by the department's SWAT team worked into the early Saturday morning hours trying to persuade two youths who had barricaded themselves on a duplex roof to surrender.

As of press time early Saturday, the parties were still talking, but no resolution had been reached.Police surrounded a duplex at 208 S. Eighth East About 10 p.m. Friday after two juveniles suspected of beating a California man barricaded themselves on the roof.

The victim - identified as Robert Toolson, 48, Pacific Palisades, Calif. - apparently had been vacationing in Utah. He was taken to Holy Cross Hospital where he was listed in stable condition early Saturday.

Salt Lake Police Sgt. Art Healey said the incident apparently began in the Avenues areawhen two youths were either picked up or forced their way into Toolson's car. After arriving at the intersection of Eighth East and Second South, the two asked Toolson to drive down an alley. When Toolson refused, he was hit in the head with a brick and kicked, he said.

"When we arrived at the intersection, we found a man who had been severely bashed in the head," Healey said.

When police determined that two youths were on the roof of a nearby duplex, other officers and the department's SWAT team were called in.

As the incident dragged on without resolve, Officer Ken Farnsworth, one of four specially training negotiators in the Salt Lake Police Department, was brought in. He stood near the corner of the duplex and talked with the youths on the roof. One of the youths' mothers was also trying to help.

The situation was complicated, however, because police were unsure whether the youths were armed.

Salt Lake Police Lt. Joel Campbell said one youth is 14 years old, but didn't know the age of the other.