BlackBerry co-founder eyes counterbid for firm

BlackBerry co-founder Mike Lazaridis has boosted his stake in the troubled Canadian tech firm with the intention of making an acquisition bid, regulatory documents showed today.

Documents filed with the Securities and Exchange Commission said Lazaridis now has eight percent of BlackBerry shares and is working with another co-founder, Douglas Fregin, "to explore the possibility of submitting a potential joint bid" for the group.