Shell Gas's media manager, Chamani Herath Pathirage told AFP that there had been an explosion in their facilities and buildings had been damaged.
Shell Gas Lanka, which is partly government owned has a terminal complex, north of Colombo, but there were no reports that the storage tanks had been hit.
The LTTE has also targetted a petroleum distribution facility, in Kolonnawa, but there was no major damage.
Meanwhile the the pro-rebel Tamilnet, said th Tamil Tigers were claiming hits to two oil storage complexes.
Tigers said the attack was in retaliation to a government raid on the northern town of Kilinochchi.
Tracer fire was seen in several areas of the city includin