Police announce new briefing on search for Christchurch man Michael McGrath

Police have announced a new briefing on the search for missing Christchurch man Michael McGrath.

Detective Inspector Sweeney will speak at Halswell Quarry at 12pm.

Yesterday the police dive squad searched a number of waterways in Halswell.

Sweeney also said police expected to finish searching a property of interest on Candys Rd today.

This week police released new security footage of McGrath leaving the Halswell New World on May 19 at 12.38pm.

The 49-year-old builder was last seen at his home on Checketts Ave in Halswell on May 21.

McGrath, who lives alone, was reported missing two days later.

Police were continuing to assess information received from the public.

Sweeney said investigators remained committed to the missing person case.

"We want to find Michael McGrath," he said.