Six people were hurt in a stabbing at New York’s Penn Station on Sunday evening, authorities said. A suspect was taken into custody after the attack.

The violence happened around 7 p.m. It happened in one of the country’s busiest travel hubs. Penn Station sits beneath Madison Square Garden. It serves Amtrak, Long Island Rail Road, NJ Transit, and New York City subway lines.

Paramedics said one victim had serious injuries. Two victims had moderate injuries. Two victims had minor injuries. All five went to Bellevue Hospital. Another person went to a different hospital.

Authorities did not say what led to the stabbing. They did not say if the victims were targeted. Amtrak police said they are investigating. They did not release the suspect’s identity or any charges.

The attack came less than a day before large crowds were expected at Madison Square Garden for Game 3 of the NBA Finals. Monday night’s game is between the New York Knicks and San Antonio Spurs. It will be the first NBA Finals game at the arena since 1999. President Donald Trump has said he plans to attend. Security was already getting stronger around the area.