Search builds for missing WA couple

Disused mine shafts are being examined in the search for a couple missing in Western Australia.

Raymond and Jennie Kehlet haven't been seen since March 22 when they were at Table Top in the state's mid-west.

Mounted police arrived in the area on Thursday while SES crews from Perth arrived on Friday to help with the search.

Fixed wing aircraft using infrared equipment and a helicopter are also being used.

Mr Kehlet, 47, is about 170cm tall, fair skinned, of medium build and was wearing all blue.

Mrs Kehlet, 49, is approximately 157cm tall, of medium build with fair skin and was last seen wearing a yellow fluorescent work shirt.