Acting on a tip off, Rab members raided the Hatem Khan new mosque at around 9:30pm and found the bomb in the mosque toilet, reports our correspondent.

The leaflet found near the bomb reads: "Help arrest JMB chief Abdur Rahman--JMB."

Rab explosives expert defused the bomb.

Sources said dissidents inside the JMB might have kept the bomb in the mosque.

Meanwhile, the Criminal Investigation Department (CID) is expected to submit charge-sheets tomorrow against militant kingpins Abdur Rahman, Siddiqul Islam alias Bangla Bhai, Rahman's brother Ataur Rahman and some others in separate cases filed for August 17 blasts in Satkhira and Kushtia.

This will be the first incident of submitting charge-sheets, accusing top militant leaders like JMB chief Abdur Rahman and Jagrata Muslim Janata Bangladesh (JMJB) operations commander Bangla Bhai.

Our correspondent in Satkhira reports: The CID, which was tasked with investigating the serial blasts in Satkhira, Kushtia and Jessore, has already finalised the charge-sheets and will submit it tomorrow before magistrate courts in Satkhira and Kushtia.

Apart from Rahman, Bangla Bhai and Ataur, 17 other JMB members are also accused in the charge-sheet to be submitted in Satkhira. They are Nasir Uddin, Maniruzzaman Munna, Monwar Hossain Ujjal, Anisur Rahman Khokon, Mahbubur Rahman Liton, Nayeem, Fakaruddin Raji, Abul Khair, Habibur Rahman, Obaidullah, Momtaz, Asadul, Noor Ali Member, Ahad and Indian national Gias Uddin.

In the charge sheet, the investigation officer (IO) of the case has observed that the two banned militant outfits, JMB and JMJB, staged the August 17 countrywide bomb blasts in reprisal for the government ban imposed on them.

Meanwhile, 15 JMB leaders and activists, including the three top militant leaders, have been named as accused in the charge-sheet for carrying out the bomb blasts at seven points in town on August 17, reports our Kushtia correspondent.

Our staff correspondent from Khulna writes: The house of Abdul Hakim Gazi, a senior teacher of St Joseph High School in the city, was used for training the JMB cadres to operate arms and detonate bombs and grenades, detained JMB cadre Mahmudur Rahman Liton alias Palash told the investigators.

Palash, also disclosed that the Tablig mosque in the Nirala residential area in Khulna city was used for recruiting youths as primary members of JMB.

"Khalid Hasan Mintu, imam of Sutarkhali Ahle Hadith mosque in Dakop upazila, and I rented the ground floor of Hakim's house at the instruction of another JMB cadre Mahmud," an investigator quoted Palash as saying.

Seeking anonymity, the investigator also said Asaduzzaman Asad alias Arif, JMB's operations commander in greater Khulna, used to train the JMB cadres at the house, using the doors as blackboard for drawing pictures of arms, bombs and grenades.

"Arif also trained us how to defend in case of any counter attack during operations," Palash told the investigators.

A police team from Khulna is now in Barguna, the home district of the militant trainer, to arrest him.

Palash further said there are over 600 members of Ahle Hadith Andolon only in Sutarkhali who work to spread the JMB across the southwestern region of the country.

Bamondanga Madrasa in Rupsha upazila was also another centre for JMB's military training, Palash told detectives on Thursday night, the investigators said.

Our Netrakona correspondent reports: Five of the six JMB members, assigned to blast bombs in the town, had been staying in the district since around one and a half months before August 17--two in guise of small vendors selling honey and ghee and three as rickshaw-pullers.

The bombers stayed at a rented house at Kurpur in Netrakona town, Kawser Alam Suman, a regional leader of JMB, told police.

Suman has already confessed to having coordinated the August 17 blasts in Netrakona, Kishoreganj and Mymensingh districts, said a police official.

Suman also admitted that he and many others received training at a centre at Sabail in Tangail.

UNB adds: Detectives held 30 suspected JMB members at Arakan Cultural Research Society in Chittagong city yesterday evening.

The DB picked up the youths when they were coming out of the Islamic organisation office after ifter.

Police said the detainees were being integrated about the August 17 bombings in the city.

However, according to BDNEWS, the DB detained 16 suspected Rohingya refugees after the iftar party.