After a knife attack in New York's Museum of Modern Art (MoMA), the police arrested a suspect.

The 60-year-old man was picked up on Tuesday in the city of Philadelphia, about 130 kilometers south of New York, the New York police said.

He is suspected of stabbing two MoMA employees on Saturday after they refused him entry.

A 24-year-old was injured in the back and neck, and a 24-year-old man in the shoulder.

Both were taken to the hospital but were in stable condition.

The man had recently had his membership in the museum revoked because he had already behaved improperly twice, it said.

When he was denied entry because of this, the sixty-year-old stabbed the two employees.

The museum in the center of the New York borough of Manhattan then remained temporarily closed, but reopened on Tuesday.

"We reopened today and look forward to welcoming you back," the museum's Twitter account said.

"We are relieved and grateful that our colleagues are recovering and that the attacker has been caught."