Construction on nearly all of the main building sites of Ulaanbaatar has either slowed down or stopped during this past week. The reason for that is a sever shortage of concrete. Mongolia has a grand total of 6 locomotive which operate on its railway system. 2 of which were already out of action due to maintenance and old age, this left the country with 4 locomotives. 2 are required to pull passenger trains and 2 are required to bring commercial goods to UB from china. Sadly last week 2 of the 4 collided with the result that they are now both out of action. The cement supplies came from China thus supplies have now run out in UB. Alternate supplies are being arranged by truck but this is more expensive and slower due to a shortage of trucks and the great distances involved. It is expected that 2 chinese locomotives will soon take the relay and bring up the much needed supplies to Ulaanbaatar so that construction may resume.