A 49-year-old man with 13 active warrants was in custody Saturday afternoon after trying to carjack a vehicle on the city's Northwest Side.

A 49-year-old man with 13 active warrants was in custody Saturday afternoon after trying to carjack a vehicle on the city's Northwest Side.

San Antonio police said the driver of a car stopped his vehicle around 1:15 p.m. when he saw what appeared to be a dog kennel at the intersection of Tioga Driver and I-10.

The driver got out of the vehicle to inspect the kennel and the suspect, holding a knife, got in the vehicle and tried to drive away with the driver's wife and children in the car, police said.

But the driver had put the emergency brake on, thwarting the would-be robbery.

The driver returned to the car and the suspect quickly got out.

Police said the driver thought the suspect attempted to slash the car's tires as he sped off.