Gunmen shot dead a secular female politician from Pakistan's troubled northwest after breaking into her home at night, police said on Saturday.

Najma Hanif, 35, was a senior member of the Awami National Pary (ANP) which is known for its outspoken views against the Taliban and backed military operations against the insurgents while it ruled the restive Khyber Pakhtunkhwa province.

A gondola and a vaporetto waterbus collided Saturday on Venice's Grand Canal, killing a 50-year-old German tourist and badly injuring his young daughter, local media reported.

The accident happened around mid-day near the canal city's famous Rialto Bridge as the public transport waterbus maneuvered toward a stop, Italy's Ansa news agency said.

An attack blamed on Somali Islamist insurgents left four people dead in eastern Kenya and prompted hundreds to flee into the bush, authorities and the Red Cross said Saturday.

"There was an attack (near) Garissa," a high-ranking interior ministry official, Mutea Iringo, told AFP. "Heavily armed Shebab carried out a raid on a police post in Galmagala. A police officer died."

German Chancellor Angela Merkel called for vigilance against far-right extremism in Europe on Saturday, ahead of a visit to a former Nazi concentration camp.

Merkel will travel to Dachau near the southern city of Munich on Tuesday, becoming the first German chancellor to visit the former camp.

A 44-year-old woman who suffered severe burns in an explosion at a fireworks festival in western Japan two days ago became the first person to die from the accident on Saturday, police said.

Hiromi Takeuchi was one of 60 people injured in the blast which ripped through food and drink stalls set up to entertain visitors at an annual festival outside the ancient capital of Kyoto.

Turkey's prime minister has accused the banned Kurdistan Workers' Party (PKK) of failing to withdraw its fighters from Turkey as agreed under a peace process, press reports said Saturday.

The PKK agreed this year to withdraw its estimated 2,000 fighters to their bases in northern Iraq. In return, it is demanding wider constitutional rights for Turkey's 15 million Kurds.

Indian police said Saturday they had arrested a top militant accused of helping mastermind the 1993 Mumbai blasts and over 40 other deadly bomb attacks across the country.

Seventy-year-old Abdul Karim Tunda, an alleged member of the banned Pakistan-based Lashkar-e-Taiba (LeT) group, was arrested by a special Delhi police team near the border with Nepal on Friday.

Twenty-five people have been killed by floods which hit northeastern China over the past week, state media said Saturday, as other parts of the country continued to experience a heatwave.

The biggest floods recorded in decades in China's northeast region, which borders Russia, began last week, submerging buildings and forcing people from their homes, China's official Xinhua news agency said.

At least 17 civilians have been killed in multiple Taliban attacks in Afghanistan, officials said Saturday, underscoring increasing insecurity for ordinary people as foreign forces complete their withdrawal next year.

An insurgent attack on a road construction workers' camp in Karukh district in the western province of Herat left nine workers dead overnight.

New Delhi and Tehran were Saturday working to resolve a dispute over the detention of an Indian oil tanker by Iranian naval guards for allegedly polluting sea waters in the Persian Gulf.

The Indian government-owned MT Desh Shanti ship was on its way back to India from Iraq when it was stopped Tuesday by the Iranian authorities and taken to Bandar Abbas port.