The Trump administration is likely to expand a ban on laptops on commercial aircraft to include some European countries, but is reviewing how to ensure lithium batteries stored in luggage holds do not explode in midair, officials briefed on the matter said on Wednesday.

Any expansion of the ban could impact U.S. carriers such as United Airlines, Delta Air Lines Inc. and American Airlines Group. Six U.S. and European officials said they expect the U.S. Department of Homeland Security (DHS) to make an announcement but declined to say when.

DHS officials plan to meet with airline industry officials on Thursday to discuss security issues, two people briefed on the matter said. Also on Thursday, Homeland Security Secretary John Kelly will give a classified briefing to senators about domestic threats and airline issues are expected to be discussed, a congressional aide briefed on the matter said.

The first list

In March, the U.S. announced laptop restrictions on flights originating from 10 airports, including in the UAE, Saudi Arabia, Qatar and Turkey because of fears that a concealed bomb could be installed in electronic devices taken onto aircraft.

Britain quickly followed suit with restrictions on a slightly different set of routes. One European official acknowledged that the expanded ban could affect flights to the United States from Britain. DHS spokesman Dave Lapan said Mr. Kelly “hasn’t made a decision but we continue to evaluate the threat environment and have engaged in discussions with airline representatives and other stakeholders.”