There was no immediate claim of responsibility for the attack near the border with Afghanistan, which has long been plagued by Islamist violence.

沒有立即聲稱對靠近阿富汗邊境的襲擊負責，阿富汗長期以來一直受到伊斯蘭暴力的困擾。

Peshawar's police chief said the bomb, said to have bean in a plastic bag contained up to 6 kg of explosives.

白沙瓦的警察局長說，據說這枚炸彈裝在一個塑膠袋裡，裡面有多達6公斤的炸藥。

The militant violence in the city and in Pakistan in general has fallen over recent years.

近年來，該市和巴基斯坦境內的武裝暴力事件總體上有所下降。

There has been an increase in attacks on the security forces in the region around Peshawar.

白沙瓦周圍地區對安全部隊的襲擊有所增加。

Some of the past attacks have been claimed by the Pakistani Taliban.

巴基斯坦塔利班聲稱，過去的一些襲擊。

However, the militant group released a statement saying they condemned Tuesday's blast on denied involvement.

然而，該激進組織發表聲明稱，他們譴責週二的爆炸事件，否認參與。

Prime Minister Imran Khan on Twitter sent his condolences to family members of the victims on the injured.

總理伊姆蘭-汗在推特上就傷者向遇難者家屬表示慰問。

Some of the wounded are said to be in a critical condition.

據悉，部分傷員情況危急。

The hospital released a list showing more than a dozen of those wounded from Afghanistan.

醫院公佈的名單顯示，有十幾名來自阿富汗的傷員。

The madrasa is largely for adult students that many were studying when the blast happened, according to local residents.

據當地居民說，該宗教學校主要是為成人學生服務的，爆炸發生時，許多人正在學習。