The bandh, called by Barak Democratic Front and supported by political outfits including opposition AIUDF and social organisations, was "total" and there was no report of any untoward incident from any district, another official said.
While Mizoram alleged that personnel of the Assam police fired on its civilians injuring one, the neighbouring state claimed that the men in uniform only returned the fire after miscreants from the other side of the border sprayed bullets on them.
A 14-year-old girl was allegedly gang-raped by three persons in Assam's Nagaon district, triggering massive protests by people on the streets.
Seven people, including two children, were killed and two others seriously injured in a landslide triggered by incessant rain in south Assam's Hailakandi district on Tuesday, an official said.
In a letter addressed to Union Home Secretary Ajay Kumar Bhalla, Mizoram Home Secretary Lalbiaksangi said that National Highway 306, the state's lifeline that connects it with the rest of the country, has been blocked in Assam since July 26.
The situation in and around Lailapur, which was rocked by deadly violence, along the interstate border remained calm with a large number of Central Reserve Police Force troops patrolling the National Highway-306, they said.
Six days after a violent clash between police forces of Assam and Mizoram claimed seven lives and injured over 50 people, Chief Minister Himanta Biswa Sarma on Sunday said such incidents along the inter-state border are 'unacceptable' to people of both the states and advocated a resolution through talks.
The meeting also decided that the two states will 'work out arrangement in coordination' with the centre to facilitate the functioning of the central peace-keeping force besides agreeing to continue talks to resolve the border dispute, according to top Mizoram officials.
The travel advisory is perhaps a first of its kind issued by any state government
His appeal came when certain organisations of the neighbouring Barak Valley region of Assam observed a 12-hour bandh on Wednesday and have been staging an economic blockade on the National Highway-306 that connects Mizoram with the rest of the country since July 26, disrupting transportation of goods to the state.
During the three-day mourning period, the national flag will fly at half-mast and there will be no public entertainment, a notification issued by the Assam government said.
Two senior government functionaries said the central government does not want to take any decision that may further escalate the ground situation.