Police officers and members of the emergency response team arrested two brothers with ties to the UN Gang following a raid at a house in the 31000 block of Wagner Drive on Wednesday.

Officers seized one kilogram of heroin worth an estimated street value of $170,000 inside the house, as well as another two kilograms of heroin following a search of a fully armoured 2001 Ford Expedition on Thursday, said APD Const. Ian MacDonald.

The overall amount of drugs seized could amount to as much as $500,000, said MacDonald, adding both brothers, aged 33 and 35, are well known to police.

"We obviously knew who these guys were and that this was a drug supply house," he said.

No charges have been laid yet and both are now free from police custody on promise to appear in court at a later date.

One of the brothers was arrested in the fortified SUV and the other brother, who was at a nearby residence, surrendered himself shortly after.

"I can't think of a better example of . . . our ability to make Abbotsford unpleasant and inhospitable for people who are involved in gangs and drugs," said MacDonald. He also confirmed that the house subject to Wednesday's raid was the site of a targeted shooting back in 2007.