Out in numbers before the demonstration began, police intervened promptly when the rally turned into an impromptu march. Several units of police in riot gear were seen chasing protesters and several arrests were made.
Scuffles erupted between police and protesters in Hong Kong on Sunday, with dozens of arrests made, after thousands marched near the border.
Vaccine teams and security forces escorting them are often targeted in attacks in Pakistan, one of three countries where the crippling disease remains. The Taliban claims the preventive drug is a Western conspiracy to sterilise children.
The van caught fire after hitting the truck in Qila Saifullah district about 200 kilometres northeast of Quetta, the capital of Balochistan province.
Police were unable to say if the blast in the city of Blankenburg was deliberately set off or if it was an accident.
Eight people believed to be still on the White Island are presumed dead, buried under ash and debris from Monday's eruption. Eight people were confirmed killed and dozens were severely burned in the blast of steam and ash.
Al Shabaab militant group said it had carried out the attack and that it had killed 10 people including "secret security agents and government employees".
A man suspected of stabbing two people to death in a terror attack on London Bridge was a former prisoner convicted in 2012 for terrorism offences, police say.
The militant attack on a police base in the north of the country also left one police officer dead and seven officers injured, police said.
General Oscar Albayalde's resignation came after he was accused of involvement in the selling of
confiscated drugs, an allegation he denies.
Four French police officers were stabbed to death by an administrator at the Paris police headquarters. The perpetrator was shot to death while the attack is believed to have begun as a workplace row.
The death of a young Kashmiri man occurred in police custody at a time when the government of India has imposed restrictions and a communication blackout in the region since August 5.
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