The concrete roof was apparently deteriorating, investigators say

Four flights to Casablanca and two to Istanbul are to operate daily through terminal 2E at Roissy-Charles de Gaulle, serving about 1,000 passengers.

Before the roof collapsed, the hi-tech terminal's capacity was about 25,000.

An initial inquiry found the 23 May collapse was caused by metal supports perforating the concrete roof.

Four travellers - two Chinese, one Czech and a Lebanese - died and three were injured when the concrete and glass building caved in.

TERMINAL 2E Opened in June 2003 Cost: 750m euros (�500m) Floor space: 104,000 sq m Capacity: six million passengers a year Made from reinforced concrete and 36,000 sq m of glass Plane parking gates: 10

The preliminary report released last month suggested the concrete was probably deteriorating at the ultra-modern, 750m euro ($927m) terminal.

"The part of 2E that reopened is running well," said Secretary of State for French Transport Francois Goulard.

The accident had sparked speculation that the whole section of the building, or even the whole terminal, might have to be demolished.

But transport ministry sources told French news agency AFP there were currently no plans to knock the rest of the building down.

Terminal 2E was designed by French architect Paul Andreu, who is currently working on a new opera house in Beijing.