sentences:  A frustrated IPKF cut off the power to Jaffna in an attempt to counter this.IPKF communication lines were extensively mined by the LTTE, which further compounded the sometimes perilous situations that the Indian troops faced.It was not before the IMSF commandos broke out of the besieged Jaffna port and cleared the heavily mined Navanturai Coastal Road that a crucial link-up between 1 Maratha Light Infantry in Jaffna fort and the advancing troops of 41st Brigade could be established that secured the Nallur area.