Iran has seized three Finns in the Persian Gulf, Finnish commercial broadcaster MTV3 reported late on Tuesday.
The Finnish foreign ministry later confirmed the report to the Finnish News Agency (STT).
According to MTV3, the Finns had been fishing near Abu Musa, an island claimed by both Iran and the United Arab Emirates, on 2 June.
Nokia Siemens Networks told STT on Wednesday that all three men were employees of its Dubai unit.
Barry French, a Nokia Siemens spokesman, also confirmed that the men had been seized during a fishing cruise.
Mr French added that the company would not release further information about its employees in order to protect their privacy.
Ilkka Kanerva (cons), the Finnish foreign minister, told MTV3 that it was possible that Iran would free the men on Wednesday.
Esa Hurtig, Finnish chargé d’affaires at the UAE, said efforts to free the men had not progressed owing to two days of public holidays since the incident in Iran. Mr Hurtig, having visited Iran’s embassy to the UAE, added the men were in good health.
Heikki Puurunen, the Finnish ambassador to Tehran, told STT he would discuss the freeing of the men with the Iranian foreign ministry on Wednesday. The ambassador added that further information could be expected in the afternoon