<br/>US special envoy Richard Holbrooke has warned Pakistan against committing itself to a gas pipeline project with Iran because of anticipated American sanctions against Tehran. <br/> <br/>Mr Holbrooke said, Islamabad should wait until it received more details on new US legislation that could affect the multi-billion dollar project. Iran signed a deal with Pakistan to supply it with natural gas from 2014. Pakistan says, it needs the gas from Iran to ease its growing energy crisis. The original plan was to carry gas from Iran to Pakistan and then to India. <br/> <br/>The US Congress is preparing new legislation which will impose more sanctions on Iran because of concerns over Tehran's nuclear programme. Mr Holbrooke, who is on a visit to Pakistan, cautioned the country against going ahead with the gas pipeline project.<br/> <br/>Pakistani Foreign Minister Shah Mahmood Qureshi said that the pipeline deal with Iran did not violate existing sanctions against Iran.<br/>