Futures for natural gas were lower in U.S. morning trading session on Wednesday, as traders were locking gains from a rally which brought prices to a 5-week high. On the NYMEX, October delivery futures for natural gas were traded at USD2.961 a MMBtu, which was a 1.05% fall for the U.S. morning trade. Earlier, prices rose by 1.4%, being traded at USD3.036 per MMBtu.