Bengaluru: In a fresh jolt to the wobbly Congress-JDS coalition government in Karnataka, two Congress legislators, housing minister M T B Nagaraj and K Sudhakar, tendered their resignations on Wednesday to the Speaker, taking the number of disgruntled MLAs who have quit to 16.

The development comes even as D K Shivakumar, Karnataka's water resources minister, the Congress' troubleshooter, was detained and sent packing back to Bengaluru from Mumbai, where he was prevented by the police from meeting the rebel MLAs. The ruling Congress-JDS coalition faces the threat of losing majority in the Assembly if the resignations are accepted, as its current tally is 116 in the 224-member House.