Components used in thousands of pagers that detonated on Tuesday in Lebanon in a deadly blow to Hezbollah were not made in Taiwan, Taiwan’s economy minister has said.

Taiwan-based Gold Apollo said this week it did not manufacture the devices used in the attack, and that Budapest-based company BAC to which the pagers were traced has a licence to use its brand.

It was not clear how or when the pagers were weaponised so they could be remotely detonated. The same applies to the hundreds of hand-held radios used by Hezbollah that exploded on Wednesday in a second wave of attacks. The two incidents killed 37 people and wounded about 3,000 in Lebanon.

“The components are (mainly) low-end IC (integrated circuits) and batteries,” Taiwan’s Economy Minister Kuo Jyh-huei told reporters on Friday.

When he was pressed on whether the parts in the pagers that exploded were made in Taiwan, he said, “I can say with certainty they were not made in Taiwan,” adding the case is being investigated by judicial authorities.

Security sources said Israel was responsible for the pager explosions on Tuesday that raised the stakes in a growing conflict between the two sides. Israel has not directly commented on the attacks.

Taiwan’s Foreign Minister Lin Chia-lung, also speaking to reporters at parliament, answered “no” when asked if he had met with the de facto Israeli ambassador to express concern about the case.

“We are asking our missions abroad to raise their security awareness and will exchange relevant information with other countries,” Lin said.

As Taiwanese authorities look into any potential link between its sprawling global tech supply chains and the devices used in the attacks in Lebanon, Gold Apollo’s president and founder, Hsu Ching-kuang, was questioned by prosecutors late into the night on Thursday, then released.

Another person also at the prosecutor’s office was Teresa Wu, the sole employee of a company called Apollo System, who did not speak to reporters as she left late on Thursday.

Hsu said this week a person called Teresa had been one of his contacts for the deal with BAC.

A spokesperson for the Shilin District Prosecutors Office in Taipei told the Reuters news agency that it had questioned two people as witnesses and was given consent to conduct searches of their firms’ four locations in Taiwan as part of its investigation.

“We’ll seek to determine if there was any possible involvement of these Taiwanese companies as soon as possible, to ensure the safety of the country and its people,” the spokesperson said.

Iran-aligned Hezbollah has pledged to retaliate against Israel, which has not claimed responsibility for the detonations. The two sides have been engaged in cross-border warfare since conflict in Gaza erupted last October.