THE Royal Adelaide Hospital -- where a gunned-down bikie-gang leader is under police guard -- was in lockdown for 90 minutes last night because of a bomb threat.

The security scare was sparked by a small package sent to wounded Comanchero Vincenzo Focarelli. The package was later cleared by the police bomb squad.

The incident highlighted the level of fear in the state amid ongoing bikie-related violence as public debate continued yesterday on community safety.

There have been a string of bikie gang-related shootings over the past two months, and on Sunday night Mr Focarelli survived the fourth attempt on his life while his son, Giovanni Focarelli, 22, was murdered.

A police spokesman last night said "the current political and community climate" demanded any threat to public safety in relation to bikies was top priority and no chances were being taken, no matter how remote the risk.

Posted in bomb threat.