Several people have been stabbed at a house close to a synagogue in New York State, reports say.
The house in Monsey, north of New York City, belonged to a rabbi, according to the Orthodox Jewish Public Affairs Council (JPAC).
At least five people were taken to hospital with stab wounds, the council said. Their condition is not known.
The motive for the stabbing was not clear. The suspect fled the scene but police said he was taken into custody.
In a tweet, JPAC said one of the victims had been stabbed at least six times.
Reports said a man brandishing a machete attacked a Hanukkah celebration at the rabbi’s property in Monsey – an area with a large population of ultra-Orthodox Jews. The incident happened at about 22:00 on Saturday (03:00 GMT).
“The house had many dozens of people in there,” Yossi Gestetner, a co-founder of OJPAC for the Hudson Valley region, told the New York Times.
The New York Police counter-terrorism unit said it was “closely monitoring” the reports.
Letitia James, the New York Attorney General, said she was “deeply disturbed” by the situation.
“There is zero tolerance for acts of hate of any kind and we will continue to monitor this horrific situation,” she said in a Twitter post.