Two people have been killed in separate incidents in Pakistan's Balochistan province, ahead of a visit by President Pervez Musharraf.
Thousands of paramilitary troops have been deployed in Balochistan
A man was killed when a bomb placed in a hand-cart exploded near a police camp in Mastung, nearly 45km from Quetta.
In another incident, unidentified people opened fire at a local tribal leader in the city of Qalat.
Police say it is not clear whether local rivals or militants were behind the attack.
No one has claimed responsibility for these attacks.
An injured person - suspected to be the bomber - has been arrested in the first incident, police say.
The bomb that went off near the regional headquarters of the paramilitary rangers in Mastung also wounded three other people, including two soldiers, police said.
In the second attack, local tribal leader Sardar Sahib Khan Umrani was killed on the spot.
Bomb attacks against government soldiers and officers are common in many parts of the south-western Balochistan province.
Most attacks are blamed on tribesmen who have been demanding increased royalties for natural resources, including natural gas and oil, extracted from the region.
Pakistan has deployed thousands of paramilitary troops in the province to protect government offices and maintain law and order.