VADODARA, June 17: The tri-weekly holiday special running between Mumbai-Gandhidham-Mumbai has been cancelled from June 15.Senior Divisional Commercial Manager Manmohan Singh said, ``The train was cancelled due to poor strength of passengers,'' and added that the services of the weekly summer holiday special train running between Secundrabad-Ahmedabad-Secundrabad and Secundrabad-Rajkot-Secundrabad had now been extended till July 31.The train 744 and 743 (Secundrabad-Rajkot-Secundrabad express) will leave Secundrabad on Wednesdays and Rajkot on Fridays on July 1, 8, 15, 22 and 29 and July 3, 10, 17, 24 and 31 respectively.The 752 and 751 Secundrabad-Ahmedabad-Secrundrabad Express will leave Secundrabad on Mondays on June 29 and July 6, 13, 20 and 27. Meanwhile the 751 will leave Ahmedabad on Wednesdays on July 1, 8, 15, 22 and 29.