 Complete the following phrase:  In early 2009 he was, by his own admission, personally involved in the re-activation of notorious Riyadus-Salikhin suicide formation, first set-up and led by Basayev between 1999 and 2004; in the next months a string of suicide attacks killed dozens of people mostly police officers and critically injured the Ingush president Yunus-bek Yevkurov, raising fears of a new campaign of attacks directed against Russian civilians. In a July 2009 interview with Prague Watchdog, when asked if people should expect a repetition of events like the 