Unidentified gunmen killed the Ethiopia country manager of Nigeria's Dangote Industries on Wednesday after he was attacked in the restive Oromiya region while returning to the capital from Ethiopia's largest cement factory, officials said.
The plant is Ethiopia's largest cement producer.
The progress, which he did not specify, took place over the last two days as the three countries' foreign and irrigation ministers and heads of intelligence met in Addis Ababa on Tuesday.
"Security forces are now pursuing the assailants", the statement added while appealing for help in identifying those behind the killing. The statement called on residents in the area to help gather details. Representatives of the company in Nigeria were not immediately available for comment.
Scene of the attack on the Dangote Ethiopian manager.
2017 protests, trucks belonging to Dangote Cement were torched by protesters, but a reconciliation ceremony had been organised in September 2017, which was attended by hundreds of locals.
Ethiopia's multi-billion dollar self-funded Grand Ethiopian Renaissance Dam (GERD), which is now under construction on the Blue Nile river in the Benishangul-Gumuz region, will be the largest hydroelectric power plant in Africa when completed, as well as one of the top 10 largest in the world.
The country remains in a state of emergency, which was imposed in February a day after then Prime Minister Hailemariam Desalegn resigned.
Sisi cited an announcement during a meeting between Sudanese President Omar al-Bashir and Ethiopia's Prime Minister Abiy Ahmed in Sudan "that Egypt's share will not be affected".
This unfortunate development follows a previous report by NAIJ.com that Nigerian business mogul, Alhaji Aliko Dangote was included on the 2018 Forbes World's Most Powerful People List.