Close allies of Toronto Mayor Rob's Ford say they will release a letter that urges the mayor to address a purported video that apparently shows him smoking crack cocaine.

Deputy Mayor Doug Holyday said Friday some members of the mayor's executive committee are very concerned and they want the issue to be dealt with. Councilor Gary Crawford says he's "not necessarily comfortable" with Ford leading the city.

The alleged crack smoking video has not been released publicly and its authenticity has not been verified. Reports on gossip website Gawker and in the Toronto Star claimed it was taken by men who said they had sold the drug to Ford.

In his only comments, Ford has called the allegations "ridiculous" and said the Toronto Star was out to get him.