Some of the ongoing Metro rail projects, including Badarpur-Faridabad extension stretch and Bangalore Metro Rail Project, being implemented on 50:50 equity sharing joint venture between the Centre and the state governments concerned are running behind schedule. Work on Mundka-Bahadurgarh extension stretch and Chennai Metro project are also delayed.<br/><br/>Minister of State for Urban Development Babul Supriyo said in a written reply in Lok Sabha today that Land acquisition, tree cutting permission and litigation are some of the reasons for the delay. However, progress of Metro rail projects is reviewed periodically by the Centre, state governments and the concerned Metro Railway Board of Directors from time to time, he said. Appropriate action such as holding of meetings, resolving issues causing delay in the project with the ministries concerned, is being taken up by the Centre to address the issue.