A female suicide bomber killed five persons and wounded dozens at a security checkpoint outside a phone market in the northeast Nigerian town of Potiskum, Yobe State on Sunday, witnesses said.

“The lady refused to be checked at the gate to the market and an argument ensued,” witness Ibrahim Maishago said on phone.

“She let off the bomb, killing herself and five others, while many were injured.”

A hospital source speaking on condition of anonymity confirmed the toll of the dead and the wounded.

It was the second such suicide attack around the same market, where new and second-hand phones are sold and repaired.

The first attack occurred January 11, when two suicide bombers, one of them appearing to be around 15 years old, blew themselves up outside the market. The attack killed six and injured 37 others.