Ola cab drivers, who went to the cab service Kukatpally office to protest against overload of work, were manhandled by bouncers engaged by the managem ent. A group of nearly 1,000 drivers reached the office, to talk about their long pending problems of non-payment of salaries and increased work load. But instead of inviting them for the talks, the management engaged bouncers, who attacked the drivers. The latter lodged a complaint with Kukatpally police over bouncers attacking them. A case has been registered and investigation is on.