内容摘要：The ban - to start in Victoria this Wednesday, instead of September - comes after two gangs attacked each other at Northland shopping centre in Preston on Sunday afternoon. A man, 20, remains in hospital in a serious condition.

The ban - to start in Victoria this Wednesday, instead of September - comes after two gangs attacked each other at Northland shopping centre in Preston on Sunday afternoon. A man, 20, remains in hospital in a serious condition.

"If you look at where these attacks are happening, it's in the departments of Cauca, Nariño, Putumayo, Arauca, Norte de Santander and Caquetá, because that's where the biggest coca plantations are, and where the illegal mining is."It is not clear who is carrying out these killings and who is ordering them. Some trade unionists blame the private sector, saying businesses, desperate to stifle any attempt by workers to organize, are paying armed groups to carry out these atrocities.

They point to the fact that threats and attacks tend to spike at times when businesses and unions are in wage negotiations.But as many of the attacks go unpunished, it is difficult to know who exactly is to blame."In the Cauca Valley there are so many different armed groups you never really know who's behind the attacks, who's carrying them out, who's ordering them," says Zenón Escobar, another sugar cane worker and local representative of Sintrainagro.

The threats in the Cauca Valley are not limited to the sugar industry."In 2007, I was in a van, and guys drew up next to us on a motorbike and asked for me, and then opened fire," recalls Jimmy Núñez, the leader of a union that represents street traders in the regional capital Cali.

"My colleague who was sitting next to me was killed, and my wife was injured. In 2010 they attacked me again, on the road between Cauca and Cali.

"They opened fire on my car. In 2012 we were attacked in a shopping centre in Cali and one of us was killed. And in 2013 my family had to leave Cauca due to threats.Its AI Overviews feature, unveiled by Google at its developers conference last year, offers AI-generated summaries that currently appear at the top of search results.

from users who posted some of the odd responses they received, as when it advised one user that non-toxic glue could help make cheese stick to pizza.Another widely circulated response stated that geologists recommend humans eat one rock each day.

A Google spokesperson said at the time that these were "isolated examples."Mr Pichai said on Tuesday that AI Overviews now gets 1.5 billion uses per month in more than 200 countries and territories.