Kano , Nigeria ( CNN ) -- An explosion near a bank killed at least 10 people in northeastern Nigeria on Friday , witnesses and rescue volunteers said . People were lined up at an ATM outside a bank on the outskirts of the town of Azare when the explosion happened , witnesses said . Cleric : 21 die in blast at Shiite ceremony , Nigeria military attack . Several other people were injured . The witnesses said the blast appeared to have come from a plastic bag near the bank . Comments from police about what caused the explosion were n't immediately available , and there was no immediate claim of responsibility . Azare has been the site of previous attacks by the Islamist militant group Boko Haram , which has waged an insurgency in northeastern Nigeria for five years in a campaign to impose its strict version of Sharia , or Islamic law . Was Nigeria 's government hoodwinked over Boko Haram 'truce ' ? Journalist Aminu Abubakar reported from Kano , Nigeria . CNN 's Jason Hanna wrote in Atlanta .
Witnesses : Blast happened as people waited to use an ATM outside a bank in Azare , Nigeria . There has been no immediate claim of responsibility . Witnesses say the explosion appeared to have come from a plastic bag .