Resarch said that the clustered bomb that have been deployed in Yemen were from Britain and is helping to traiin the Saudi forces.
There is still no ceasefire between Yemen and its opponent Houthis. UN continues to record casualties.
Airstrike killing people still continues as the Yemeni President turns down the proposed UN Peace Deal.
Oil rose 3 percent on Tuesday, the most in three weeks, as a weak dollar lifted commodities denominated in the currency and OPEC raised slightly its forecast for world oil demand growth.
Brent crude prices held near a 4-1/2 month high above $65 a barrel on Monday, supported by concerns about fighting in Yemen disrupting Middle East supplies and signs that U.S. shale output may have started to decline.
Crude oil prices settled up 3 percent on Thursday, hitting 2015 highs, while U.S. gasoline reached 5-month peaks after Saudi Arabia and its allies maintained a bombing blitz in Yemen that heightened concerns about the security of Middle East oil supplies.
Brent crude oil steadied around $63 a barrel on Tuesday, not far below the 2015 high, supported by worries that a civil war in Yemen could destabilize the Middle East, affecting oil supplies.
Crude oil rose on Tuesday after a forecast that U.S. shale oil output would record its first monthly decline in more than four years and on tension in Yemen, where top oil exporter Saudi Arabia is embroiled in a civil war.
Oil tumbled 5 percent on Friday, erasing the previous session's gains, as Yemen's conflict looked less likely to disrupt Middle East crude shipments and investors turned their focus to talks for a potential Iran nuclear deal that could put more supply on the market.
Oil prices fell more than $1 on Friday, after sharp gains in the prior session, as worries of a disruption to supplies due to Saudi Arabia-led air strikes in Yemen eased.
Oil settled up about 3 percent on Wednesday as a weak dollar, fighting in Yemen and speculative buying boosted crude prices in spite of U.S. inventories building to record highs for an 11th week.
Falling world oil prices will hurt countries across the Middle East unless Saudi Arabia, the world's biggest crude exporter, takes action to reverse the slump, Iran's deputy foreign minister told Reuters.
The United Nations Security Council imposed targeted sanctions on Friday on Yemen's former President Ali Abdullah Saleh and two senior Houthi rebel leaders for threatening the peace and stability of the country and obstructing the political process.
Yemen will destabilise its economy if it delays reforms such as cuts to energy subsidies, the International Monetary Fund said in a report released after the government rolled back some fuel price rises in the face of political unrest.