Two graffiti suspects were arrested early Wednesday morning after security cameras captured them allegedly enter the Hunter Street GO Transit station, spray paint at least one train car and then take a selfie.

The GO station is equipped with new security cameras that pick up facial recognition and immediately send images to transit safety officers in site, said Metrolinx spokesperson Anne Marie Aikins.

The transit officers and police responded and the suspects were arrested on site.

Hamilton police said the pair were dressed like painters and wore baseball hats.

After taking pictures of themselves and their alleged work, they spotted officers approaching, police said. They were arrested after a short foot chase.

Two men, aged 24 and 25, face a charge of mischief under $5,000.

Officials are still assessing the extent of damage, but Aikins said graffiti costs Metrolinx millions of dollars a year.

It also temporarily takes the affected train car out of commission, as it's important to repaint them quickly, she said. If spray paint sits for more than about 24 hours it can leave a hologram.

It's often difficult to catch graffiti suspects who cover their faces, but the new camera technology — recently put in place in high risk locations — is helping, Aikins said.

While it's a small percentage of people who commit such acts of vandalism, it's important to tackle because "it costs us all and takes trains out of commission," she said.