Reports said Congress has plans to shift the candidates to some hotels in Guwahati, Tezpur, and Kaziranga on April 22 and keep them out of bounds from poachers.
Police sources said Laskar was interrogated twice for several hours during the last 48 hours and his statements have been recorded in front of a magistrate.
Bengali-speaking Muslims, considered to be the vote bank of Congress and the minority-based AIUDF, are large majorities in several of these seats.
This year, the main contest is between the alliances led by the BJP and Congress.
The Election Commission heard the matter on Saturday in the presence of returning officer for the constituency Sanjiv Sarma, but no decision has been announced so far.
Earlier, Union Home Minister Amit Shah on Sunday expressed deep grief over the killing of five jawans in the encounter between the security forces and Naxalites near Tarrem in Bijapur district.
Pijush Hazarika, the Minister of State for Health and Family Welfare, said he will come to the police station on Sunday to give his statement.
Badruddin Ajmal said AIUDF will support a leader from Congress as the next CM of Assam if the 'Grand Alliance' is voted to power.
Additional District Magistrate Rajeshan Terang has been asked to conduct the enquiry and submit a detailed report within three days.
The protest rally was not allowed to move forward on the busy arterial G S Road and stopped at the gate of the state Congress headquarters 'Rajiv Bhawan'.
The PM said the people would not tolerate those who insult Assam’s pride and identity and give them a befitting reply in the polls.
The EC had initially barred the senior Assam minister from campaigning for 48 hours for allegedly making threatening remarks against Bodoland People's Front Chief Hagrama Mohilary.
Campaigning for the third and final phase of Assam assembly elections comes to an end on the evening of April 4.
No deliberate or mala fide intention to disrupt poll process: EC's special observer on Assam EVM row
The observer said the incident appears to be an isolated one due to the total negligence and foolishness of the presiding officer and his team.
The AIUDF Organisational General Secretary Aminul Islam slammed the BJP leader and said the power has made him arrogant and disrespectful.