Liang Daoxing, former deputy mayor of Shenzhen, is under investigation on suspicion of a serious disciplinary violation, making him the fifth high-level official caught up in anti-graft efforts in Guangdong province in just over a month.

The investigation into Liang was announced on the website of the Guangdong Provincial Party Commission for Discipline Inspection on Saturday.

Liang, 63, was deputy mayor of Shenzhen between 2002 and 2009. He acted as director-general of the executive office of the 26th Summer Universiade, which the city hosted in 2011.