The soldier crossed over to India along with six hardcore terrorists through the Indo-Pak border in Pathankot.
Top police officials of Dhubri, in Assam, have been transferred.
With two more deaths, the fatalities due to flood this year has gone up to 18.
One of its cadres was shot dead by security forces.
A total of 1.79 lakh hectare agricultural land was submerged and around 90 per cent of rhino habitats -- the Kaziranga National Park and the Pobitora Wildlife Sanctuary -- are under water.
In a case of fratricide, a Border Security Force trooper allegedly killed two officers and injured another at a remote border post in Assam's Dhubri district before shooting himself on Thursday.
The flood situation affected nearly 26.5 lakh people across 28 districts.
At least 15 people have died in heavy floods and landslides triggered by continuous rain for the last three days in Assam, where airforce helicopters, army, National Disaster Response Force and State Disaster Response Force have been pressed into service for rescue work, officials said.
The Bodo peace accord which was signed between the Government of India and now disbanded Bodo Liberation Tiger in February 2003 to pave the way for formation of Bodoland Territorial Autonomous Districts Council is now under question with non-Bodos living in the BTC areas raising objections to it in the wake of Bodo pressing for their demand for a separate Bodoland state.
The situation in the state remained grim on Monday.
The flood situation in Assam worsened on Saturday with four more deaths reported and over 6.5 lakh people being affected in more than 1,400 villages due to incessant rains across the state.
While the flood waters receded in Bongaigaon and Sivsagar districts of Assam, fresh inundation occurred at a dozen villages in Nagaon even as four districts continued to reel under the impact of floods on Sunday.
Heavily-armed National Democratic Front of Bodoland (Songbijit) militants unleashed violence in two districts of Assam falling under Bodoland Territorial Administration area, killing 11 people, including three children, and leaving three others seriously injured since Thursday night.
The constituencies spread across lower and central Assam will have 12,699 polling stations where 1,04,35,271 voters will be able exercise their franchise.
Nine more bodies were recovered from a village in Baksa district on Saturday morning, taking the toll to 32 in the violence unleashed by National Democratic Front of Bodoland-Songbijit militants in Bodoland Territorial Administration Districts area in Assam.
The death toll in Assam in the current flood rose to 30 on Wednesday with 14 bodies recovered from worst-affected Goalpara and Kamrup (rural) districts even as relief and rescue work continued round-the-clock.
At least 32 people, including 13 children, were killed and eight others injured when two mini buses carrying brick kiln workers and their families were hit by a truck on NH 35 in lower Assam's Barpeta district in the wee hours on Thursday.