NIAMEY, Sha'ban 28, 1437, Jun 4, 2016, SPA -- Thirty soldiers from Niger and two from Nigeria were killed in a Boko Haram attack by "hundreds of assailants" on Friday on the southeastern town of Bosso close to the border with Nigeria, the Niger defence ministry said on Saturday, Reuters reported. It was the deadliest attack carried out in Niger by group since April 2015, when at least 74 people, including 28 civilians, were killed at the Lake Chad island of Karamga. "The counter-offensive conducted early this morning helped to retake control of all the positions in the city of Bosso. The situation is under control," the defence ministry said in a statement. "A sweep is ongoing in the area with the mobilisation of all land and air means". Seven others from Niger and eight from Nigeria were injured in the attack that targeted a military post, according to the ministry, which reported "several deaths" among the assailants. The town of Bosso is part of the Diffa region, where many refugees and internally displaced people have sought shelter from Boko Haram violence elsewhere. The region has been targeted numerous times in attacks blamed on the militants. -- SPA 20:32 LOCAL TIME 17:32 GMT www.spa.gov.sa/w