Police believe no one hurt but urge public not to pick up explosive devices and say more may be found

• Follow our Australia news live blog for latest updates

• Get our breaking news email, free app or daily news podcast

Nearly a dozen pipe bombs, some of them already detonated, have been found on footpaths and in parks in the nation’s capital, sparking a major police investigation and warnings not to touch the potentially explosive items.

ACT police Det Acting Insp Anna Wronski could not say where the pipe bombs came from or who was behind them, but said the matter was being taken extremely seriously.

• Defending motorbike champion breaks collarbone and sternum

• Australian drops from first to fourth overall after crash on dunes

Australian world champion Daniel Sanders has vowed to battle on with a broken collarbone and sternum, despite the crash ending his dream of becoming back-to-back Dakar Rally motorbike champion.

Regardless of the pain that awaits him over the final three days in the Saudi Arabian desert, the reigning Dakar and world rally-raid motorcycle champ is adamant he will fight on to the end of the sport’s most celebrated and gruelling race on Saturday.