A St. Catharines woman has been charged with impaired driving causing bodily harm after a migrant worker was hit by an SUV while cycling at Lakeshore and Townline roads in Niagara-on-the-Lake on Sunday night.

Niagara paramedics treated the 40-year-old NOTL worker for a serious injury at the scene, near Green Acre Automotive, and police said the man was transported to an out-of-region hospital for further care.

Niagara Regional Police said the man, whom they did not say was a migrant worker, was in stable condition in hospital on Wednesday. Friends in the community identified him as a farm worker.

Investigators said when they arrived just before 7:30 p.m., the driver of the SUV had left the scene.

However, while officers were investigating the collision the driver returned to the scene on foot, police said.

Officers concluded the driver had been drinking and arrested a woman.

Amanda Boyle, 50, faces a charge of impaired operation of a motor vehicle, causing bodily harm.

Investigators said a 1999 black Jeep was travelling on Townline Road when it collided with the cyclist, who was westbound along Lakeshore Road at the intersection.

The driver is alleged to have made a sudden erratic movement just prior to the moment of impact, police said.

The cyclist fell onto the road and the driver continued along Lakeshore Road, police said.

The driver returned to the scene and then left the area.

While officers were investigating the collision, the driver again returned to the scene, this time on foot, police said.

The driver was later released and the vehicle was impounded, police said.