Websites of some Japanese government agencies were hit by cyberattacks over the weekend, temporarily blocking access to them,Kyodo news agency reported on Monday, citing national police.
The attacks affected the websites of the National Personnel Authority, a video distribution service and a site run by the Cabinet Office, the National Police Agency said, according to Kyodo.
Police said they believed the websites were hit by distributed denial-of-service attacks in which hackers overwhelm a target website with massive amounts of data using a multitude of compromised "zombie" computers.
The NPA said online messages were posted in China calling for attacks on Japanese websites ahead of Sunday, the 80th anniversary of the "Mukden incident" which led to the Japanese invasion of China.
China has been accused of spearheading online attacks on government agencies and companies, allegations Beijing has always denied.
In June, Internet giant Google said a cyber-spying campaign originating in China targeted Gmail accounts of senior US officials, military personnel, journalists and Chinese political activists.
Reuters photographer Beawiharta was aboard the plane with his wife, two sons and daughter. About 20 minutes after take-off, there were two sharp bangs, sending cabin staff scurrying to retrieve the meals they had only just begun serving.
The plane began shaking violently, he said, and the lights went out. He could smell something burning.
His son, Pradipta, 15, said he saw nothing as he peered out the window.
"But I asked him to cup his hands to get a better view," Beawiharta said. "He shouted: 'I see fire! I see fire!'
"Panicked, he then asked: 'Will we die? Will we die?' I took his hand and told him firmly: 'No, we are going to live.'
"Behind us, passengers were praying: 'God, save our flight! Give us your protection!'"
Prayers and panic The prayers got louder and louder, pierced by only the occasional cry of panic.
"A stewardess told us an engine had caught fire and we were on our way back to Singapore. Glued to the window, my son said he could see lights, the sea and ships and then lights on the ground. We all grabbed life jackets from beneath our seats, but the plane landed smoothly.
"Within five minutes, as firefighters doused the damaged engine, we walked off the plane into the terminal."
In the waiting room, the pilot greeted assembled passengers.
"The best that we can ever ask of passengers is to stay cool, stay calm ... which you did," he said. "And for that we thank you."
Flight CX715 had taken off from Singapore heading to the Indonesian capital, Jakarta, at 1:12 a.m., but soon turned around after engine trouble and landed at 1:57 a.m., Singapore's Changi Airport said in a statement.
Story: Qantas to sue Rolls-Royce over 'defect' Firefighters extinguished the fire and normal flight operations resumed on the runway about an hour later, the airport said.
It was the second time in six months an Airbus had to make an emergency landing in Singapore because of engine problems. A Qantas A380 turned around shortly after takeoff Nov. 4 when one of its Rolls-Royce Trent 900 engines disintegrated.
The airport would not say how many passengers were on board Monday's flight or what kind of engines the plane used. A spokesman for Hong Kong-based Cathay Pacific was not immediately available for comment.