Tanzania’s main opposition party has called for telecoms firm Tigo to respond to a former employee’s accusation that the company helped the government track the location of an opponent who was later targeted in a failed assassination attempt.

A former worker at Tigo’s parent company, Millicom told a British court this month that Tigo had shared mobile phone data with the government showing the location of opposition lawmaker Tundu Lissu in the weeks before the attack.

Lissu’s car was sprayed with bullets in September 2017 by unknown assailants, according to court filings seen by Reuters.

“We will force Tigo to tell us who they were communicating with. Who from the government asked them to track me 24 hours. They have to tell us names.”