Police in the capital city are investigating a security service company that reportedly earns commissions for helping local governments intercept and lock up petitioners in "black jails", according to media reports. Beijing Municipal Public Security Bureau officials have detained Zhang Jun, chairman of Anyuanding Security Service Company, and Zhang Jie, general manager of the company, for "illegally detaining people and illegal business operation", the Southern Metropolis Daily reported on Saturday...According to media reports, the company...took [petitioners]..., seized their IDs and phones, and locked them up until the liaison offices told the company to help send the petitioners back to their hometowns...The...company denied their service includes "allocating petitioners", and said its business is still going. "I don't know about anything reported by the media. I'm in charge of bodyguard recruitment, and we're still doing business. I don't know if our company does any business like the media reported," said a man surnamed Yu who works for the company.