The Communist Party of India-Marxist's district office here was stoned on Sunday evening, a day after City Mayor V.K. Prasanth suffered injuries in a scuffle between CPI-M and BJP councillors. Windowpanes of the CPI-M office were broken and other property damaged in the stone-throwing incident. Skirmishes were also reported between CPI-M and Bharatiya Janata Party/Rashtriya Swayamsevak Sangh workers near the Thiruvananthapuram airport and in Kannur district. While two CPI-M youth wing activists were attacked near the airport, a local party leader was attacked at Iritty in Kannur.