Myanmar authorities appear to be deliberately slowing down the Internet ahead of this weekend's election to make it more difficult for journalists to get images and news out of the country, rights groups said today.

The highly secretive military junta has not announced any Internet slowdown but analysts say it fits a pattern of new restrictions put in place ahead of Sunday's vote, including tighter controls over the movement of aid agencies and the suspension of a visa-on-arrival system for travellers.

Other measures include barring entry to foreign journalists and outside observers.

The poll will be Myanmar's first elections in 20 years, but critics have widely dismissed it as designed to ensure the military retains power with a civilian facade.

The junta aggressively censors the Internet, routinely blocking politically sensitive websites. During a crackdown on pro-democracy protesters in 2007, the junta completely cut access to the Internet and shuttered many cybercafes.

"I'm not surprised to hear that the Internet is grinding to a halt," said David Mathieson, a Myanmar researcher with New York-based Human Rights Watch.

"It's a slow squeeze," Mathieson said. "They're slowing everything right down so the potential for negative information to come out is greatly reduced."

Hotels and travel agents that rely on the Internet for business say the slowdown started a week ago and many are advising travellers that Internet connections cannot be guaranteed for at least a week.

"The situation with the Internet connection is not stable. We don't know exactly how long it will last. We hope it will be better after this weekend," said a worker on the reservation desk at Yangon's upscale, colonial-era Strand Hotel. She spoke on condition of anonymity for fear of drawing unwanted attention from authorities.

The slowdown has been mentioned in Myanmar's tightly controlled media, none of which have blamed the government.

The "7 Day News" weekly reported in its October 28 issue that the problem appeared to stem from a hacker attack and was affecting all Internet service providers.