The Egyptian stock exchange has suspended trade on Orascom Telecom pending the firm’s planned Tuesday announcement of material information, three traders told Reuters on Monday.

The Cairo-based firm told the exchange it would make its statement on Tuesday, without providing details.

South Africa’s MTN Group has said it is in talks about a potential deal, without naming who it was speaking with. A source told Reuters on Thursday than MTN was seeking $5 billion to buy Orascom assets.