West Bengal Governor CV Ananda Bose on Tuesday upped the pressure on Chief Minister Mamata Banerjee and her government, declaring he will "shift base" to Sandeshkhali if Sheikh Shahjahan - the main accused in sexual assault and land grab allegations - is not arrested within 72 hours. The time limit slashes that imposed by the Bengal government on itself - seven days. "I have written to the state government and given a deadline of 72 hours for the arrest of the main culprit. I will shift my base to Sandeshkhali if the arrest is not made..." Mr Bose told NDTV.