The four are suspected of facilitating a suicide bombing that killed more than 30 people, Pakistan's interior minister said.
The socialist grandee and his daughter are being investigated for suspected "laundering of tax-fraud proceeds".
Police say they are investigating three incidents targeting rail infrastructure that caused travel delays.
The disappearance of the 84-year-old mother of news anchor Savannah Guthrie has left a community searching for clues and hoping for her safe return.
Lt Gen Vladimir Alexeyev was shot several times inside his apartment block on Friday morning.
The company quickly realised its mistake and managed to recover virtually all the missing tokens from customers.
The Ukrainian leader says difficult issues remain, as Russia carries out further strikes on energy facilities.
Some Zambians outraged Ghanaians by describing the outfit worn by their president as a "blouse".
Some Zambians outraged Ghanaians by describing the outfit worn by their president as a "blouse".
At least 31 people have been killed after a suicide bomber detonated a device at a Shia mosque, according to police.
Nearly 200 decaying bodies were discovered at the Return to Nature home after officials investigated a foul smell.
Nearly 200 decaying bodies were discovered at the Return to Nature home after officials investigated a foul smell.
Some desperate Iranians want US intervention, but others worry that it would not achieve the peace protesters ultimately want.
Some desperate Iranians want US intervention, but others worry that it would not achieve the peace protesters ultimately want.
The BBC's Regan Morris is in Tucson, Arizona, where 84-year-old Nancy Guthrie disappeared from her home almost one week ago.
The order did not specify the rate that could be imposed, but used 25% as an example.
The order did not specify the rate that could be imposed, but used 25% as an example.
Anke Gowda, whose library is open to everyone, recently received an Indian government award.
Ciara and Samuel L Jackson are among the big names who have become citizens of African countries in recent years.
With Super Bowl half-time shows becoming increasingly polarised, how will the Puerto Rican superstar quiet his detractors?
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