Premier Chris Minns on Monday unveiled a package of proposed measures aimed at disrupting and prosecuting organised crime networks, following the suspected mistaken identity shootings of university student Marco Tapia and 40-year-old Joshua Macdonald in Sydney last week.

"It seems as if some of that violence has spilled into innocent parties … and families being ruined who have had nothing to do with organised crime behaviour," Mr Minns said. "This is immoral, evil behaviour from organisations that are intent on making money from the misery of other people in our community and we are determined to stop it."

Under the changes, new aggravated offences for conspiracy and attempted murder would carry a maximum penalty of life imprisonment, up from 25 years. Interim orders would allow urgent restrictions to be imposed on a person's movements, communications and device access before a full Supreme Court order is made.

The government will also expand serious children's indictable offences to include conduct linked with organised crime, such as public shootings and firebombings. This means young people accused of such offences would be tried in higher courts and risk facing adult penalties if convicted.

Police have previously said underworld figures who have moved offshore are contracting young people to carry out killings and other violent crimes. NSW Police Commissioner Mal Lanyon said some children were being paid "for a very small amount of money" and showed disregard for the consequences of their actions.

"The police force will continue relentlessly to target these people," Commissioner Lanyon said. "But there are mums and dads and members of the community who know that some of these young people are out and about and they know they are mixing with people and getting themselves into trouble … we need that information."

The government will also invest $15 million to expand NSW Police technology capabilities aimed at "smashing open" criminal networks that use encrypted devices and digital platforms.