February 3, 1981

Eighty-four suspected illegal aliens, many of them crowded into a tractor-trailer truck, were seized in the South Bronx yesterday after shots were fired without warning at two police officers responding to a report that ''suspicious persons'' were getting out of the truck. Fifty-one of those arrested, including 14 women, were still in the truck, in which all 84 had allegedly traveled for nearly three days. Henry S. Dogin, district director of the Immigration and Naturalization Service, said two men - identified as Roopnarine Singh, a resident alien from Guyana, and Efrain Vega, a United States citizen from Puerto Rico - were arrested on charges of unlawful transportation of illegal aliens in the United States. Said to Be From Mexico Mr. Dogin said the 83 Dominicans and one Guatemalan seized in the roundup were reported to have entered El Paso from Mexico late last Friday or early Saturday and to have packed into the trailer for the trip to New York.

Petro-Canada, the Government-owned oil company, is in the final stages of an agreement to acquire Petrofina Canada Ltd. from Belgian interests for $1.2 billion (in American funds), the two parties reported today. The acquisition would be the first breakthrough in the Government's campaign, announced last October, to end foreign domination of the country's oil and gas industry. Petro-Canada would acquire the Belgian parent's 71 percent interest in Petrofina, one of the smallest of the foreign-owned oil companies operating in Canada.

They took places at the head of classes yesterday, sitting in for the teachers who had moved out. Some of them just milled about in the hallways. They were the parents of students at the largely white annex of Intermediate School 231 in Rosedale, Queens, and they said they would fight to keep their school.

President Reagan, in an action that showed his determination to move away from the Carter Administration's emphasis on human rights as a key factor in foreign policy, agreed in a meeting today with President Chun Doo Hwan to normalize relations with South Korea. Mr. Reagan specifically promised Mr. Chun, whose human rights policies were severely criticized by the previous Administration, that the 39,000 American troops stationed in South Korea would remain there. Following what the White House called a ''friendly'' meeting between Mr. Reagan and Mr. Chun, a senior State Department official made it clear that military ''security,'' not Mr. Chun's domestic policy, was now the main concern in relations between Washington and Seoul. Congressional aides said the Administration had asked Congress to delay publication of a report on human rights violations in nations around the world to avoid embarrassing President Chun. (Page A6.)

The Wells Fargo National Bank charged today that it had been defrauded of $21.3 million by a group of sports promoters and companies that used the name of the former heavyweight boxing champion Muhammad Ali. Sources in the Federal Bureau of Investigation said they believed that if the allegation is true, the fraud is one of the largest in the history of American banking. Mr. Ali, who has said that he allowed his name to be used by an organization called Muhammad Ali Professional Sports Inc., known as Maps, but was not involved in the management or control of it, has not been accused of participation in the alleged fraud. In a lawsuit filed today in the Los Angeles County Superior Court, Wells Fargo charged that the fraud ''was accomplished by internal manipulation of funds involving 13 separate accounts.''