Amtrak rail service between New York and Boston was restored after a lightning strike was believed to have caused a circuit breaker to malfunction, the rail service announced Saturday night.

The malfunction caused a power outage on all tracks between Penn Station in New York and Union Station in New Haven, Connecticut, beginning Saturday afternoon.

Amtrak announced the service had been restored in a statement posted on its website.

Evening trains between Boston and Virginia were operating on schedule Saturday. Most trains were expected to be on schedule Sunday, although some Sunday train services were cancelled and others were expected to operate on a modified schedule, the company said.

The European Union is imposing sharply higher customs duties on electric vehicles imported from China. EVs are the latest flash point in a broader trade dispute over Chinese government subsidies and Beijing’s burgeoning exports of green technology to the 27-nation bloc.

The higher duties went into effect on Friday, pending a final decision in four month’s time.

After an eight-month investigation, the European Commission, the EU’s executive arm, found that companies making electric cars in China benefit from massive government help that means they can undercut rivals in the EU on prices, take a big market share and threaten European jobs.

The higher duties are not a goal in themselves but “a means to correct an imbalance,” commission spokesman Eric Mamer said late last week. “We certainly hope we can come to a solution which would allow us not to have to move forward on this path.”