AMSTERDAM, Aug 13 (Reuters) - A blast at a storage facility

for petroleum products at the Netherlands' Rotterdam port killed

one person and wounded several others on Thursday, officials

said, adding that the cause was unknown.

A spokesperson for major energy commodities trading company

Gunvor said an "incident" occurred during maintenance work on a

storage tank. A police spokesperson said that there was no

immediate sign of sabotage and that all possible scenarios were

under investigation.

Rotterdam is Europe's largest port and comprises oil

refineries, liquefied natural gas terminals and multiple

petrochemical facilities. Shell, Exxon Mobil,

BP and Gunvor Energy are among the energy majors

operating at the port.

The explosion occurred at around 11:30 a.m. (0930 GMT).

Gunvor said it was cooperating with local authorities.

Shell said its operations at the port were unaffected by the

blast.

A Rotterdam Port spokesperson said LNG terminals were not

affected.

Exxonmobil ( XOM ) shut all units at its 191,000 barrels/day

Rotterdam refinery due to a power outage, consultancy Wood

Mackenzie said in an alert to clients seen by Reuters.

Exxonmobil ( XOM ) did not immediately respond to a request for comment.

Rotterdam Port said there was no connection between the

blast and the power outage.