BEIJING — A man attacked two American tourists, killing one and injuring the other, at an ancient landmark in Beijing on the first day of the Olympic Games today, then leapt to his death from the structure, state media reported.

A Chinese man attacked the two Americans — a man and a woman — and their Chinese tourist guide on the second level of the Drum Tower, a popular tourist attraction in north Beijing, the official Xinhua News Agency reported.

Citing the Beijing Municipal Government Information Office, Xinhua said Tang Yongming, 47, killed the American man and injured both the American woman and the female guide.

Tang then "killed himself by jumping from the second story of the Drum Tower," Xinhua said.

The two women were rushed to a hospital, Xinhua said.

The government information office did not specify the method of attack, the news agency said.

The International Olympic Committee said the Americans, relatives of a men's volleyball coach, were stabbed.

The attack occurred just hours after competition started for the Olympic Games, a source of national pride for China which has also imposed unprecedented security measures in the capital to prevent protests or other trouble.

U.S. Embassy spokesman Richard Buangan said it was "aware of the reports of the accidents suffered by two American citizens."

He declined to comment further, but said U.S. officials were in contact with relatives of the two Americans who are in Beijing.