Celtic investors are being targeted by suspected ‘boiler room’ fraudsters.

Club bosses warned shareholders to be vigilant after some received suspicious calls, asking questions about their investments in the football club.

A spate of calls have been reported to officials at Parkhead who issued a warning to those affected.

They urged shareholders not to reveal personal details.

In a statement, the club said: “Shareholders should be extremely wary of any unsolicited advice, offers, approaches or other communications regarding their shares and personal information.

“Following a recent increase in the prevalence of so called ´boiler room´ scams, the Financial Conduct Authority and the Institute of Chartered Secretaries have produced advice warning investors about unsolicited communications concerning investment matters.”

It is thought the calls may be linked to a share scam, where fraudsters offer worthless, overpriced or even non-existent shares.

The statement added: “If the call persists, hang up.”

Parkhead shareholders have previously been warned about ‘boiler room’ scams.