MIDTOWN, Manhattan (PIX11) — A man stabbed a woman twice in Manhattan on Wednesday in an unprovoked attack, police said.

The woman, 61, was on 57th Street between Seventh and Eighth Avenue when the man walked up and stabbed her twice in the shoulder around 3:40 p.m., an NYPD official said. He fled west on 57th Street.

The woman was taken to a hospital for treatment, officials said.

Police have not yet released a description of the attacker.

Submit tips to police by calling Crime Stoppers at 1-800-577-TIPS (8477), visiting crimestoppers.nypdonline.org, downloading the NYPD Crime Stoppers mobile app, or texting 274637 (CRIMES) then entering TIP577. Spanish-speaking callers are asked to dial 1-888-57-PISTA (74782).