US energy firms injected 79 billion cubic feet of natural gas into storage in the week ended April 24, broadly in line with expectations of 80 bcf. This compares with a 105 bcf build in the same week last year and a five year average increase of 63 bcf. Total inventories rose to 2.142 trillion cubic feet, standing about 5.7% above year ago levels and 7.7% above the seasonal average. In the previous week ended April 17, storage levels increased by 103 bcf.