Public TV station SRF quotes Vaud canton (state) police spokesman Pierre-Olivier Gaudard as saying one person has yet to be recovered from the wreckage.
The crash happened late Monday on a regional line about 50 kilometers (31 miles) southwest of the capital, Bern.
Pictures on the website of local daily 24 Heures showed the two regional trains locked together but still on the tracks.
Earlier this month, 79 people were killed in a high-speed derailment in Spain.
More Nation & World Headlines
Myanmar fisherman goes home after 22 years as a slave Christie says he’s running for president to ‘change the world’ Tunisia beach gunman trained in Libya with museum attacker, official says Death toll in Indonesian military plane crash rises to 74 Report urges major steps to help victims of cardiac arrest Official: Prison chief, 11 others put on leave after escape Same-sex marriage fight turns to clerks who refuse licenses GOP’s Jeb Bush to release 33 years of personal tax returns
Our new comment system is not supported in IE 7. Please upgrade your browser here.