Tirupati: The state Vigilance and Enforcement Department has ramped up its investigation into the complaints of corruption and other irregularities at the Tirumala Tirupati Devasthanams during the YSR Congress rule. The probe was initiated following chief minister Nara Chandrababu Naidu's pledge to “begin the cleansing of AP from Tirumala.” The investigation covers all TTD operations including the allocation of protocol …