Police have issued a warning about a dangerous new drug being manufactured in WA.

Dimethyltryptamine also known as DMT was seized at two suspected drug laboratories in Glendalough and Willeton last week.

The Acting Assistant Police Commissioner Fred Gere says police are trying to crack down on the suppliers and manufacturers of the substance.

"This one here has very similar properties to LSD, so hence there is the need to be very, very cautious," he said.

"It is always a concern to police, especially when you look at the side-effects of illicit drugs.

"And being made in Western Australia as well, is of significant concern to us.

"Organised Crime are looking at the manufacturing side of it as well as the distribution of it."