Japanese firm Icom said Thursday that it had stopped producing the model of radios reportedly used in recent blasts in Lebanon around 10 years ago.

“The IC-V82 is a handheld radio that was produced and exported, including to the Middle East, from 2004 to October 2014. It was discontinued about 10 years ago, and since then, it has not been shipped from our company,” Icom said in a statement.

“The production of the batteries needed to operate the main unit has also been discontinued, and a hologram seal to distinguish counterfeit products was not attached, so it is not possible to confirm whether the product shipped from our company,” it said.

It added that products for overseas markets are sold exclusively through its authorized distributors, and that its export program is based on Japanese security trade control regulations.

“All of our radios are manufactured at our production subsidiary, Wakayama Icom Inc., in Wakayama Prefecture, under a strict management system... so no parts other than those specified by our company are used in a product. In addition, all of our radios are manufactured at the same factory, and we do not manufacture them overseas,” the statement said.

In the second wave of device explosions in as many days, 20 people died and more than 450 were wounded on Wednesday in Hezbollah strongholds in Lebanon, officials said.

A source close to Hezbollah said walkie-talkies used by its members blew up in its Beirut stronghold, with state media reporting similar blasts in south and east Lebanon.

They came a day after the simultaneous explosion of hundreds of paging devices used by Hezbollah killed 12 people, including two children, and wounded up to 2,800 others across Lebanon, in an unprecedented attack blamed on Israel.

There was no comment from Israel. The White House warned all sides against “an escalation of any kind”.