According to an AFP correspondent, more than 200 protestors defied police warnings and marched towards a park in the economic capital that had become the epicentre of mass mobilisation against the removal of fuel subsidies.
One protester fainted from inhaling the tear gas.
Troops deployed heavily on Monday after President Goodluck Jonathan was forced into a partial climbdown over fuel prices by nationwide strikes that threatened to shut down the production of Africa’s largest oil exporter.
Heavily armed soldiers have since been stationed in parts of the country and sealed off the main protest ground in Lagos.
Thursday’s protests were led by a former presidential candidate in the 1999 elections, Tunji Braithwaite, alongside a host of other respected Nigerians, including a former finance minister, Muslim leaders and lawyers.
“As elders we are totally against the military siege in Lagos. This is a democracy. They should be withdrawn immediately,” Braithwaite told the protesters before the march.