In western Czech Republic, at least four people including one Czech and three foreigners were killed when the helicopter they were traveling in crashed on Wednesday. <br />''<br />''<br />''The Czech CTK news agency said the four-seater Robinson R44-Raven helicopter came down in an industrial zone in a suburb of the town of Plzen. Local police said that the foreign victims could be Thai nationals. <br />''<br />''<br />''<span style="color: #222222;">No-one from the Thai embassy in Prague could be contacted immediately.</span><br />