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Body found at Melbourne beach

A body has been found floating in water at a Melbourne beach.

Police say the body, believed to be male, was spotted in water off Altona about 7.30am on Monday.

The body has not yet been identified and the cause of death is unknown.

Police will prepare a report for the coroner.

Adelaide police have tasered a man who had barricaded himself in a house after confronting police while armed.

Officers were called to a unit in the suburb of Queenstown at 2.10am on Monday where the man was allegedly armed with a machete and what was later discovered to be a replica firearm.

Police immediately withdrew and the man barricaded himself inside refusing to come out.

STAR group officers surrounded the home and police negotiators began speaking with the man until about 6.45am when police used an electronic control device to disarm and detain the suspect safely.

He is now being questioned by police.

Several coal mines in northern NSW have been shut down as protesters continue their battle to stop development.

About 150 people are protesting at six mine sites in the Gunnedah basin on Monday.

The Leard Forest Alliance says every open-cut mine owned by Whitehaven Coal in the area has been shut down by protesters, including Maules Creek.

Protesters have locked themselves to gates, scaled a coal loader to hang a large banner and climbed tall structures.

Leard Forest Alliance spokeswoman Helen War said she questioned the developmental process the Maules Creek mine was put through.

"Protesters are calling for a immediate stop to work at the Maules Creek mine," she told ABC radio.

"And for the NSW government to conduct a full inquiry into the flawed approval process that allowed that mine to get approval."

The Maules Creek mine has been plagued by protest activity and legal challenge for years, due to concerns about environmental damage and dislocation of farmers.

The project is scheduled have its first coal railed out in March next year.

A Whitehaven Coal spokesman says claims the six sites have been shut down are false.

"There have been some minor disruptions, but works are proceedings as normal," he told AAP.

It's understood workers are being directed onto the site through access points that are not blocked by protest activity.

They're blooms of love, but these roses certainly aren't from Miranda Kerr's ex-husband.

The Australian supermodel left her five million Instagram followers guessing on Monday when she posted a pic of a pretty bunch of pink roses.

"Lucky girl #thankful," was all the 31-year-old wrote to caption the image.

Fans would be forgiven for asking whether the flowers were a present from billionaire James Packer.

Kerr has been persistently linked to the Australian casino mogul ever since she split with her English actor husband Orlando Bloom, and Packer parted ways with wife Erica last year.

The pair have denied the rumours for months, but last month were snapped together in Spain boarding a boat near Packer's luxury super yacht.

The photos came weeks after their respective former spouses were spotted on holiday together in Spain.