Seattle ? A man walked into a Jewish organization Friday afternoon and opened fire, killing one woman and injuring at least five others before he was arrested, officials said.

The gunman, who employees said claimed to be a Muslim angry at Israel, forced his way through the door at the Jewish Federation after an employee had punched in her security code, said Marla Meislin-Dietrich, a co-worker who was not at the building at the time.

Staff members said they overheard him saying “‘I am a Muslim American, angry at Israel,’ before opening fire on everyone,” Meislin-Dietrich said. “He was randomly shooting at everyone.”

Police would not confirm the account.

David Gomez, an FBI assistant special agent in charge of counterterrorism, said investigators believe the gunman targeted the Jewish Federation of Greater Seattle.

“We believe at this point it’s a lone individual acting out antagonism toward this particular organization,” Gomez said.

Authorities have been advising synagogues and Jewish groups to be watchful in the weeks since hostilities erupted between Israel and Lebanon.

The federation’s Web site describes its mission as “to ensure Jewish survival and enhance the quality of Jewish life by meeting needs locally, in Israel and worldwide.” It was among the sponsors of a Solidarity With Israel rally last weekend.

The shooting ended shortly after it erupted about 4 p.m.

Jim Pugel, an assistant police chief, said the shooter called 911 and was talked out of the building.

Police blocked off several city blocks and evacuated several nearby buildings as they investigated. A SWAT team searched the federation building, looking for any other victims or any other possible shooters, police spokesman Rich Pruitt said.

But Pruitt said investigators were confident that the man they had in custody was the only suspect.