A dog bit a motorcyclist in Taipei for the second time this morning, after footage of the first attack earlier this month went viral online.

The pit bull owned by a man surnamed Hsu (徐) attacked a motorist on March 6 in Wenshan District (文山), and this morning bit a 43-year-old man on a motorcycle in Daan District (大安).

The man bit today was bleeding heavily from severe lacerations to his right thigh, and has been discharged from Taipei Medical University Hospital after receiving multiple stitches.

The man has not yet pressed charges against Hsu, although police have reported the incident to the Taipei Animal Protection Office, which may impose a fine on the owner.

At 8am today, Hsu stopped at a red light on Daan’s Wolong Street when the dog allegedly opened the window of the pickup truck, jumped out and attacked a rider behind the vehicle, the Taipei Police Department's Daan Precinct said.

The dog clamped down on the man’s leg and only let go after Hsu repeatedly struck it on the head and bystanders intervened, it said.

The first incident occurred on March 6 at 8am on Wanmei Street Section 2, when the dog once again jumped from an open window before attacking a motorcyclist surnamed Huang (黃).

The dog only stopped once the owner stepped out of the car to restrain it.

To stop animals and children from accidentally opening car windows, drivers should lock all windows and pet owners are advised to use leashes or muzzles when driving with animals in the car, police said.

If a pet bites someone, owners must take legal responsibility and may face criminal or civil charges, they added.