A few trains were delayed after boulders and muck fell on the railway tracks between the Nagnath-Palasdhari section and the Lonavala-Karjat Ghat section on the Mumbai-Pune line around 12.50 am on Friday, railway officials said. The boulders, that fell on the Up-line which goes towards Mumbai, were removed by 8.15 am after which services were restored, officials added.