Soviet star Dimitri Belozerchev, winner of the all-around competition Friday, added three gold and one silver medal in individual events at the World Gymnastic Championships yesterday in Budapest.

Belozerchev, competing in five of six events, won the pommel horse and the high bar, tied for first with Japan's Koji Gushiken on the rings, and was second in floor exercise.

Soviets dominated individual competition. Crtour Akopian, third all-around, was first in the vault, and Vladimir Artemov tied with China's Lou Yen for first on the parallel bars.

China, first in team competition, had one other individual gold medalist--Tong Fei, who scored a perfect 10 for floor exercise.

Soviet athletes won five golds and two silvers in the individual events. Chinese gymnasts received two golds, three silvers and two bronze medals. Gushiken was the only competitor not from the U.S.S.R. or China to win a gold.

French gymnast Philippe Vatuone tied Soviet athlete Alexander Pogorelov for second on the high bar, the first French medal at a world championship in 33 years.

Bart Conner's fifth place in floor excercise was the best U.S. placement. Teammate Peter Vidmar spoiled a good showing on the high bar with a fall.

In women's competition, Soviet star Natalia Yurchenko, the all-around champion who had qualified in each event, was forced to withdraw with a sprained right knee suffered vaulting.

First place on the beam went to the Soviet Union's Olga Mostepanova, runner-up in the all-around. Ekaterina Szabo of Romania won the floor exercise, Maxi Gnauck of East Germany finished first in the uneven bars, and Boriana Stoyanova won the vault--the first world title for a Bulgarian.

Julie McNamara of the U.S. was sixth in the vault and seventh on the uneven bars, and teammate Kathy Johnson was eighth in the floor exercise.

Soviet weightlifter Vyacheslav Klokov set two world records while winning the 110-kilogram (242 pounds) class at the World and European Weightlifting Championships in Moscow.

Klokov broke his jerk record of 243 kg (534.6 pounds) by lifting 247.5 kg (543.4 pounds), according to Tass. He had a two-lift total of 440 kg (968 pounds), besting the record of Olympic gold medalist Leonid Taranenko, also of the Soviet Union.

Klokov won the snatch competition with a lift of 192.5 kg (423.5 pounds).

Juan Antonio Samaranch, president of the International Olympic Committee, expressed concern in Budapest about the U.S. military presence on Grenada, and said security measures for the Los Angeles Summer Olympics appeared adequate.

"We are very concerned about each such incident," said Samaranch, when asked at a news conference to comment on the U.S. presence on the Caribbean island. "We need peace and calm so we can stage good Olympic Games."

Samaranch, attending the last day of the 22nd World Gymnastic Championships, said he was "satisfied at this point" with measures to ensure the safety of athletes at the Summer Olympics July 28-Aug. 12. "The Los Angeles Organizing Committee has done its best to avoid problems," he said.