The Islamists' assault on the Borno state capital saw rocket-propelled grenades (RPGs) fired into homes, said witnesses and security sources.
He had armed backup in the form of Estonian security officers nearby but they were unable to react in time because of the use of flash grenades and because their communications were jammed.
The other team opened fire and ran around to the vehicle entrance at the side of the building, hurling grenades.
Police in riot gear drove people from the streets of Baltimore with teargas and smoke grenades on Tuesday night, after hundreds of protesters defied a 10pm curfew to continue demonstrating over the death of Freddie Gray.
All the telecom towers in the town were destroyed during the attack with RPGs [rocket-propelled grenades].
In September, Russian operatives reportedly jammed communications and threw smoke grenades in order to abduct an Estonian special services agent from a border post that Estonia said was located in its territory.
Estonia says that in the immediate aftermath of Friday's incident, Estonian and Russian border guards conducted a joint investigation of the site which found impact craters from the grenades on the Estonian side and multiple footprints on a sand cordon on the border, suggesting that a group of men had crossed from Russia.
"They were throwing grenades like maize to chickens," said the software engineer.
Enton could then be seen running from police lines still clutching her sign as smoke grenades and pepper bombs were fired.
Detectives say there is no intelligence that links these crimes to police killer Dale Cregan, who committed a grenade attack on one of his victims, and who, according to police, used hand grenades as his "calling card".
The assailant threw two grenades at Mr Ibrahim's entourage, driving through the dusty plaza that the Iraqi regime created when in 1991 it bulldozed the rebels' hideouts in the old souk.
