All infrastructure arrangements for the conduct of the Commonwealth games, to be held at Delhi from October 3-14, will be ready by the middle of September with tight security cover provided for the event, a top official of the CWG Organising committe said here on Monday.

Several steps,including use of state-of-the art-technology, have been taken to tighten security.'There will be tight security cover at all venues as was seen in the recent world cup hockey and in ongoing Indian Premier League, Twenty20 cricket' Jiji Thomson, special director-general, organising committee Commonweath Games 2010,told reporters.

Safety of athletes, official and visitors during the games is the top most priority of the organising committee,he said, adding initially some countries expressed concern,but now everyone is fully satisfied with security arrangements.

All infrastructure arrangements will be ready by the middle of September, Thomson said.

Seventyone Commonwealth Associations from 53 countries will vie for the honours in this mega event, he said.

There will be 17 sporting events including Rugby and Netball introduced for the first time in the CWG, he said, adding about 8000 athletes are expected to participate.

"Spirits and energy levels are high and all efforts are being made to ensure that India is among the top two nations in the medals tally at Delhi 2010," he said.

The expense for the development of infrastructure without including airport and metro modernisation, was estimated at USD two billion, he said.