least 11 Somalis. During a national holiday ceremony held at the Ogaden town of Jijiga, the grenade thrown at the podium of the stadium also wounded Somali regional president Abdulahi Hassan Mohammed in the leg. Bereket Simon, an adviser to Prime Minister Meles, blamed the ONLF as well as Eritrea since it arms the ONLF. However, the ONLF denied the accusations. The bombing triggered a huge stampede in the stadium which led to the death of around six children. Ethiopia says dozens more Somali civilians have been killed by ONLF over the years, including women and children. Discovery of oil As of 2009, no oil has been found in the Ogaden. The U.S. Energy Information Administration has been quoted as estimating that Ethiopia has 428,000 barrels of crude oil reserves. However, experts believe the real prize is the estimated 4 trillion cubic feet of natural gas. This potential has drawn large companies such as Petronas from Malaysia and Lundin Petroleum, based in Sweden, to the inhospitable and nearly roadless Ogaden. Various media sources have wrongly stated that there is oil in Ogaden but there has been no oil discovery in the Ogaden. Contrary to popular claims, the Ogaden region is a resource poor desert and has lacked development for centuries under nomadic tribes that the federal Ethiopian government receives very little income from the region. Due to the nomadic nature of the natives and due to the ONLF insurgency, the current Ethiopian government is said to spend a large portion of the budget for infrastructure development in the Ogaden region despite the government getting proportionally very little tax revenue from the locals. Other ONLF attacks An ONLF grenade attack on a cultural gathering in Jijiga killed four middle school students on May 28, 2007. In a separate attack, fifty civilians were injured, including the regional president Abdullahi Hassan, and three artists were killed on May 28, 2007 by the ONLF. An ONLF attack on the town of the Debeweyin woreda in the Korahe Zone also left ten civilians dead, including two schoolteachers and a pregnant woman. A second attack on the town of Shilavo left five civilians dead, while an ONLF-planted landmine near Aware in the Degehabur Zone exploded, killing three civilians traveling by automobile. Another ONLF unit struck in the district of Lahelow near the Ethiopia-Somalia border, targeting members of the Isma'il Gum'adle sub-clan, twelve of whom were slain.