MONTREAL, AUG. 28 -- Canadian army officials said today that they will use tank forces to dismantle barricades erected by Mohawk Indians at Oka and Kahnawake, and violence broke out between Indians and residents of the area surrounding one barrier.

Lt. Gen. Kent Foster said plans have been made to evacuate people from the military zones if necessary and that residents in surrounding areas will be told to stay in their basements. He would not say when troops will begin dismantling the barricades. Quebec Premier Robert Bourassa issued the order for their dismantling on Monday.

The Indians put up the barricades in Oka, 18 miles west of Montreal, nine weeks ago to protest extension of a golf course onto what the Mohawks say is ancestral land.

In support of the Oka group, Mohawks at the Kahnawake reserve blocked Mercier Bridge, which links several communities on the south shore of the St. Lawrence River with Montreal. In angry demonstrations, residents of neighboring ares complained of lengthy commuting detours and lost business.

About 60 carloads of Mohawks from the Kahnawake reserve crossed the bridge today and tried to use a side road at the Montreal end. They were met by a crowd of about 500 people, some armed with baseball bats.

Provincial police and Royal Canadian Mounted Police officers intervened, but people in the crowd hurled rocks and chunks of wood, breaking car windows and reportedly causing some injuries. Eventually, police cleared a path, and the cars continued to Montreal.

Dozens of other Mohawks left Kahnawake by boat, arriving at a public dock in a Montreal suburb. "I feel sad waiting here," said Treena Deslormiers, 20, as she waited for her younger brother. "It is unbelievable -- people coming by boat here because they're scared for their lives."

Foster, chief of the army's mobile command, said in announcing his intentions that further steps will depend on whether the Mohawks fire at the army. "It depends entirely on the reaction of the Mohawks," he told a news conference at St. Hubert.

The army said the Mohawks are armed with at least 170 automatic weapons and could have far greater firepower. The Indians have an intricate network of trenches, bunkers and strongholds built by people with some knowledge of military fortifications, according to the army.

{The army released a video Tuesday in which army officials described the Mohawk arsenal as including AK-47 assault rifles and Uzi submachine guns, the Reuter news agency reported. "We suspect they may have land mines, plastic explosives and a mortar," an officer said in the video.}

If members of the Mohawks' paramilitary Warriors Society offer resistance, both sides will suffer heavy casualties, army Col. Bob Elrick warned at another news conference today in Ottawa. "Unless the Warriors are willing to cooperate, removing the barricades peacefully will be an impossible task," Elrick said.

Foster said three Leopard assault tanks will give troops the best protection to tear down the barricades "in a peaceful fashion." He said soldiers would use the unarmed tanks, each equipped with a bulldozer blade, to remove the barriers.

Foster said the operation also would include increased aerial and marine surveillance. CF-5 fighter jets will join helicopters in the air over the region, he said, and the navy training vessel Acadian will join police boats in patrolling the St. Lawrence River.

The armed confrontation between Quebec police and the Mohawks settled into the current state of siege when a policeman was killed July 11 as officers tried to tear down an Indian barricade and a gun battle erupted. Blame in the death has not been fixed.

Negotiations have failed to end the stalemate. On Monday, Bourassa said he was through with talks and would ask the army to remove the barricades, but last-ditch discussions were reported underway today between Kahnawake Grand Chief Joe Norton and Quebec authorities at a hotel in suburban Dorval.

{Catholic bishops called Tuesday for a comprehensive process for settling several hundred Indian land claims, according to Southam News Service. "When the crisis is over, nothing will be resolved," said Bishop Charles Valois, whose diocese includes Oka.

{The Canadian Conference of Catholic Bishops sent letters Tuesday to Bourassa and Prime Minister Brian Mulroney urging them to set up a negotiating mechanism to ensure the recognition of the Mohawks' rights. The bishops also urged Ottawa to develop mechanisms for just settlement of all aboriginal claims.

{About 4,000 soldiers have surrounded the reservations, but the army has declared it will not shoot first, Reuter reported. "No person who is standing at a barricade without arms needs to fear the Canadian army -- whether it's women, children or Mohawks," Foster said.}