World News Update, what you need to know

Russia won't be pressured to stay away from the G20 summit in Brisbane as it is not a discussion about human rights and democracy, Prime Minister Tony Abbott says; he also poured cold water on the prospects of a global deal to tackle climate change during his meeting with the Canadian Prime Minister in Ottawa.

ELSEWHERE:

WASHINGTON - Cybercrime has grown into a global industry worth almost half a trillion dollars, with no sign of slowing, US researchers say.

LOS ANGELES - A couple who shot dead two Las Vegas police officers in cold blood apparently saw them as oppressors, a spokesman says, revealing chilling details of the execution-style attack.

KARACHI - Thirty people are dead after Pakistan's military fought an all-night battle with Taliban gunmen who besieged Karachi airport, while there are fears up to seven workers could also still be trapped somewhere inside.

RIGA - NATO has launched one of its largest military manoeuvres in the Baltic states since tensions spiked with neighbouring Russia over its annexation of Ukraine's Crimean peninsula.

LONDON - British comedian and actor Rik Mayall, who found fame in the cult TV series The Young Ones, has died aged 56.

DAMASCUS - Syrian President Bashar al-Assad has announced a "general amnesty" for all "crimes" committed to date, a week after a controversial election held amid raging conflict.