NEW YORK - The search is on for the man behind a double stabbing Tuesday in Manhattan.

The chaos unfolded late in the afternoon on 25th Street near Ninth Avenue in Chelsea.

Investigators say the attacker slashed an 18-year-old in the stomach.

That's when a 20-year-old man intervened, he was also stabbed.

Both were rushed to Bellevue Hospital with non-life threatening injuries.