Police have executed a major search warrant in Markham, seizing over 1,000 Marijuana plants with a street value estimated to be in excess of $1 million.

The bust occurred at a home on 78 Saffron St. at about 7:15 p.m. Thursday.

Police were tipped off by a member of the public and had been investigating the address for a few weeks.

When officers from the Drugs and Vice Enforcement Unit arrived Thursday they discovered that the interior of the house had been completely altered to grow Marijuana, with venting and pipes throughout and holes cut in the floors.

They found plants of varying sizes on all three floors, some as high as three feet.

There was mold throughout the house as a result of the high degree of humidity required to grow Marijuana.

One man was arrested.

The suspect does not own the house and Det. Peter Fleming says police are still trying to figure out his role in the operation.