Chennai: In a move that might complicate UPA government’s efforts to push through the bill to provide reservation in promotion to SCs and STs in government jobs, its key southern ally DMK today backed Samajwadi Party’s demand for extending similar quota to OBCs also.

“SP leader Mulayam Singh Yadav did not say there should be no reservation for SC and ST communities, but only questioned why the Bill did not cover OBCs.