A producer of the sitcom Frasier, an executive with a California optical network company and two officials with the Los Angeles Kings hockey team were among those killed Tuesday when two passenger jets slammed into the World Trade Center towers in New York City.

Hijackers downed four passenger jets on Tuesday, two in New York, one in Washington, D.C., and one in a remote area of Pennsylvania.

It was the deadliest act of terrorism ever on U.S. soil.

David Angell, a producer of the NBC comedy starring Kelsey Grammer, and his wife, Lynn, were aboard one of the planes that crashed in New York, said Angell's brother, Most Reverend Kenneth Angell, Bishop of the Roman Catholic Diocese of Burlington, Vt.

The couple was on American Airlines Flight 11 from Boston to Los Angeles, he said.

Angell, who also wrote episodes of the TV comedies Wings and Cheers, shared six Emmy Awards for his television work.

"He was a kind and gentle man with a quiet exterior that masked one of the sharpest comedy minds ever to write for television," said his co-producers, David Lee and Peter Casey in a written statement. "David's wife, Lynn, was the love of his life. She epitomized Southern graciousness and charm."

Edmund Glazer, 41, also was among the 92 people aboard the plane, said officials with MRV Communications Inc. in Chatsworth.

Glazer was chief financial officer and vice president of finance and administration for the company, a manufacturer of optical network components and systems.

He is survived by his wife, Candy, and son, Nathan.

Garnet "Ace" Bailey, 53, director of pro scouting for the Kings, and Mark Bavis, an amateur scout for the team, were aboard United Airlines Flight 175 the second plane to hit the World Trade Center, said Mike Altieri, the team's public relations director.

The Boeing 767 was scheduled to fly from Boston to Los Angeles, arriving in time for the opening of training camp Wednesday.

"We've received confirmation from both of their families that they were on Flight 175," said Altieri.

Bailey was entering his 32nd season as a player or scout in the NHL and his eighth as the director of pro scouting for the Kings. He spent the previous 13 years as a scout with the Edmonton Oilers, who won five Stanley Cups during that time.

Bailey, who lived in the Boston suburb of Lynnfield, Mass., is survived by his wife, Katherine, and son, Todd.

Family members of some passengers on the two hijacked American Airlines planes met with grief counselors at the Los Angeles Airport Marriott, where they remained secluded several hours after arriving.

Several dozen family members were believed to be at the hotel, said Rick Dickinson, a spokesman for the American Red Cross.

Counselors were provided by the Red Cross, American Airlines and the Salvation Army.

"People are very distraught, very upset," he said. "They don't believe it's happened."

At a copy shop inside the hotel, workers posted a sign for the families.

The sign read, "Our prayers and sympathies go out to all of the families affected by the terrorist's (sic) attacks in New York, Washington, D.C., and Pennsylvania."