Several hundred people attended a mass at Breaffy GAA Club in Co Mayo last night, where prayers were offered for missing club member David Gavin.

The 26-year-old is believed to have drowned in Canada last weekend.

Prayers were offered for his parents, sister and girlfriend during the mass.

After the religious service, Breaffy club officer Gerry Bourke assured the Gavin family that the local community would continue to do all it could to support them in the coming days.

An online fundraising effort has generated close to €130,000 and separate fundraising collections are also taking place around Co Mayo. The money will be used to cover the costs associated with the ongoing search operation.

It is understood the official police search is being scaled back but surface and foreshore searches are taking place where possible.

A private team of divers from Victoria travelled to the scene last evening and are scheduled to begin dives later today.

A dedicated voluntary dive team from Idaho in the United States is also traveling to British Columbia in the coming days to assist. It is hoped they will be in a position to complement the other divers by the weekend.

Air support helicopters are on hand to carry out aerial surveys of the lake and locals are arranging for a fleet of boats to search the area over the weekend.

The congregation at last night's service were told that all money raised would go towards the cost of financing the private search crews.

The online campaign on the GoFundMe website has received donations from around the country and around the world, as members of the GAA community and others respond to the needs of one of their own.