A/HRC/33/38 21. On 14 August 2015, the Popular Committees bombed three houses reportedly belonging to prominent members of the Islah Party in Othmah District, Dhamar Governorate. Witnesses stated that about 20 members of the Popular Committees placed and detonated improvised explosive devices on the premises of a residence housing four families, destroying the house and its holdings. On 11 September 2015, the home of a prominent Islah leader was blown up in the village of Al-Jaws Bani Wael in Ibb Governorate. Witnesses told OHCHR that on several occasions the Popular Committees had threatened to destroy the homes of residents suspected of sympathizing with Colonel Abdul Wahhab al-Waeli. This campaign of intimidation by the Houthis led to extensive displacement among the local populations, particularly in Udayn District, Ibb. The inhabitants of the bombed homes had been evacuated prior to their destruction. (b) Allegations of use of landmines 22. OHCHR documented cases in which civilians had allegedly been killed or injured by landmines in areas controlled by pro-Houthi and pro-Saleh armed groups. The Office was unable to verify when the mines had been laid. In one incident, on 14 August 2015, a child was killed and two civilians injured as a result of a landmine detonation in the Abeed valley, Serwah District, near the main road between Mareb and Sana’a. A similar incident occurred on 23 September 2015, when six civilians, including two children, were killed and two women injured as a result of a landmine detonating in the Al-Dhabab area near Taizz. (c) Sniper attacks 23. OHCHR documented incidents in which civilians had allegedly been shot at by snipers positioned in areas and buildings controlled by the Popular Committees. On 12 September 2015, an 8-year-old girl was shot and killed by a sniper on Arba’en Street in Taizz. Witnesses said that her relatives had been unable to immediately rush to her rescue because of continuing shooting by snipers, and that Popular Committee fighters had been positioned on nearby rooftops. 2. Air strikes by the coalition forces affecting civilians and civilian objects 24. OHCHR has documented incidents in which air strikes by the coalition forces had an impact on localities with a high concentration of civilians, including markets and residential areas, as well as on events such as wedding ceremonies, frequently incurring high casualties and causing substantive infrastructural damage. The cases monitored by the Office indicate that air strikes were the single largest cause of casualties, resulting in approximately one third of the deaths and injuries recorded by OHCHR. Attacks on markets8 (a) 25. OHCHR documented five attacks on markets during the period covered by the report, which collectively incurred the killing of 269 civilians; 124 civilians were injured. The following are the gravest and most representative attacks. On 15 March 2016, the coalition forces launched two air strikes on Khamees market in Mastaba District, Hajjah, during peak hours (see figure II). As a result, 107 civilians, including 25 children, were killed and 37 civilians, including 4 children and 1 woman, were injured. A total of 16 shops were destroyed. Several witnesses interviewed by OHCHR hours after the attack stated that, at the time of the attack, there was a military checkpoint manned by four to six officers from the police and members of the Popular Committees about 250 metres from the market. 8 8 See annex I, section C, for information on other attacks on markets documented by OHCHR.