More than 100 State Police and other law enforcement officers were concentrated in the Speculator-Wells area this morning in a manhunt for the slayer of an 18-year-old Schenectady boy, that occurred yesterday morning.

State Police said that the body of Philip A. Domblewski, a June graduate of Mont Pleasant High School in schenectady, was found tied to a tree and stabbed several times in a wooded section off Route 30 in Hamilton County, five miles northeast of Wells.

The site where the body was found was less than 50 miles from the Warren County site where the body of a 22-year-old Massachusetts man was discovered on July 20. Daniel Porter of Concord, Mass., was fatally stabbed while camping with Susan Petz, 22, of Skokie, Ill. Miss Petz has been missing since the discovery of Porter's body.

"The two killings were very similar, and not very far apart," said State Police Capt. Joseph Gillespie. "We are not necessarily tieing them together at this time, but we are investigating the possibility"

State Police earlier this morning said they believe they are looking for Robert Garrow, based on the registration of an automobile found abandoned in the area.

Garrow, listed as sought only for questioning, won dismissal of charges of unlawful imprisonment and possession of marijuana in Syracuse last April, police said.

A judge dropped the charges after determining that Garrow had been "framed" by two hitchhikers who had ridden in his car last November, records showed.

Earlier in the investigation, State Police said they were looking for a man they described as 5-foot-11, between 210 and 220 pounds, husky, brown-haired and slightly balding, blue-eyed and had a tattoo on the left forearm that read "Mother and Dad," encircled by a heart. Police also said that he had a rifle or shotgun and a hunting knife.

The suspect was spotted early this morning and bounded back into the woods, according to police.

State Police warned all campers and other persons in the vicinity to be on the lookout for any person in that vicinity seeing a man fitting that description should contact their nearest law enforcement agency.

The area being searched was described as the side of a mountain and bloodhounds and helicopter were being used.

A State Police spokesman said that a hunting gun and knife-wielding man broke into the tent occupied by four young people about 9:30 yesterday morning.

Karen Malinowski, 23, of Amsterdam, who was camping with the slain youth, told Hamilton County Sheriff's deputies that the man tied the four of them up by their hands to trees, then stalked back and forth among them.

She stated that he tied the four so they could not see each other. Miss Malinowski told deputies that the man seemed especially hostile toward Domblewski.

Two other young Schenectady men, who were camping with Domblewski and Miss Malinowski, managed to escape. They were identified by police as Nicholas S. Fiorilla, 20, and David K. Freeman, 19.

Domblewski's companions later told police that the attacker claimed he had killed before and that he would kill again, and bragged that he was wanted by the FBI and State Police.

The three freed themselves, split up and went to Wells and Speculator to call police. One of the boys went to a Wells restaurant and told as much of the incident as his hysteria permitted, police said.

When the boy returned to the campsite with two hunters from the restaurant, they discovered that the others had escaped and found Domblewski's body.

Garrow pleaded guilty in 1961 to a charge of first-degree rape and was sentenced to 10 to 20 years in prison. He was released on parole in 1968.