[UPDATE BELOW] A cyclist on the Williamsburg Bridge was hospitalized in serious condition after losing control of her bike attempting to avoid another cyclist.

The woman, reportedly in her mid-20s, was riding down the south side of the bridge's bike path in Brooklyn yesterday around 9:40 p.m. when another cyclist apparently passed suddenly on her left, causing her to lose control.

Saw an accident on #williamsburgbridge Help on the way. Stay safe #bikenyc — yawen c. (@yaweneep) April 29, 2015

"A guy on another bicycle came out of nowhere and almost collided with her," a police source told the Daily News. "She lost control and hit a garbage can and landed on her face."

"She got scared and she lost control," the source added. "When we got here she was screaming."

Yawen Chen, a cyclist who passed the crash immediately after it happened, said the woman had "lots of blood on the side of her face."

"By the time I saw her, a cop had just reached her, but more help was on the way," she said. "I hope she's okay... looks to be a really bad crash."

A spokesperson for the FDNY said the woman was taken to Bellevue Hospital. Her condition is unknown, but we'll update as more information becomes available.

Update, 3 p.m.: Another witness, Francisca Molina, sent the following additional account: