The trial starts today for four men accused of conspiring to kill police officers at the Coutts border blockade last year.

They were arrested in February of last year after a cache of weapons were found in a trailer near the blockade.

Chris Carbert and Chris Lysak of Lethbridge, Jerry Morin of Olds and Anthony Olienick of Clareshom face several charges.

According to documents released last September police discovered 35,000 rounds of ammo, two pipe bombs, tactical gear and gas masks.

They also intercepted calls claiming there was another stash in Nanton.