The returnees, who were mostly people working in factories in the states, were placed in two isolation facilities near the capital, Yola, for a 14-day observation to determine their COVID-19 status.
While 59 of the returnees were placed on an isolation facility in Numan, 40 others were quarantined at the Kpacham facility in Demsa, two gateway towns to Yola.
The Secretary to the State Government (SSG) and Chairman of the Adamawa State Covid-19 Containment Committee, Bashir Ahmad, said in an interview on Saturday that he ordered the isolation of the returnees on Friday.
He said his action was in keeping with instruction by Governor Ahmadu Fintiri on handling of people coming into the state from elsewhere.
The SSG, who led a team of experts and security operatives to monitor compliance with the interstate travel ban, specified that the neighbouring states were not cooporating.
He appealed to Gombe, Bauchi and Taraba state governments to enforce the interstate travel ban.