According to Amnesty International: "Coalition forces have repeatedly launched strikes using internationally banned cluster bombs in and around villages around Sa’da city. Amnesty International found remnants of two types of cluster bombs, BLU-97 submunitions and their carrier bombs (CBU-87) north of the city, and the more sophisticated CBU-105 Sensor Fuzed Weapon (carrying Blue-108 Sensor Fuzed submunitions) south of the city. On 4 July on the outskirts of Nushoor, a village north-east of Sa’da city, Amnesty International found scores of BLU-97 submunitions, many unexploded, spread over a large field, the size of a football pitch. Residents of the area told researchers that they were dropped by coalition aircraft in the last week of May. In the intervening weeks, some of the yellow soda-can sized submunitions, each with a small parachute attached, had already become partly buried and less visible, and thus even more dangerous for unsuspecting civilians who risk setting them off by inadvertently stepping on or touching them." ^[+]