Two armed men rape woman in Oakland

File photo of emergency room sign. Red Emergency Sign at Hospital File photo of emergency room sign. Red Emergency Sign at Hospital Photo: Steven G. De Polo / Getty Image Photo: Steven G. De Polo / Getty Image Image 1 of / 28 Caption Close Two armed men rape woman in Oakland 1 / 28 Back to Gallery

A woman was transported to the hospital after two armed men sexually assaulted her early Sunday in Oakland, authorities said.

The assault occurred about 2:30 a.m. on the 2000 block of International Boulevard, near the intersection of 20th Avenue, police said.

Two men, who had a knife, raped a woman before fleeing the scene, police said.

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The woman, whose name was not released, was transported to the hospital due to head pain, police said.

The assailants were not arrested, and information on suspects was not immediately available.

Sarah Ravani is a San Francisco Chronicle staff writer. Email: sravani@sfchronicle.com Twitter: @SarRavani