Kerala Chief Minister Pinarayi Vijayan returned to Thiruvananthapuram yesterday from the US after completing his treatment for an undisclosed ailment. He left the state on September 2 along with his wife Kamala and was treated at the famed Mayo Clinic in Rochester, Minnesota. His trip was originally scheduled for August 19 for a period of 17 days, but it was postponed due to the heavy rains and subsequent floods that ravaged the state.