“They refused to sign in, bypassed the security,” a witness said on condition of anonymity, adding that the plain-clothes agents asked about expatriate quotas and permission from authorities to operate.
The agents from the country’s secret police left the US news network’s bureau after about 20 minutes, leaving a phone number with instructions to contact the authorities, the witness said.
Separately on Monday, security forces fired tear gas, shot in the air and used armoured vehicles to disperse protesters after President Goodluck Jonathan reduced petrol prices in a bid to end a nationwide strike now in its second week