Philippines defence minister, who is at the summit in Vientiane, orders the release of photographs.
Batang Police and Central Java Police conducted an investigation and concluded that a flat tyre was the primary cause of the accident.
The leaders were scheduled to meet in Laos at a gathering organised by the Association of Southeast Asian Nations.
At the two-day gathering took place in the scenic Chinese city of Hangzhou
Duterte described Obama in vulgar terms and said that he won't allow the American leader to jeopardise his anti-drug campaign
Defence Secretary Delfin Lorenzana says a Philippines air force plane spotted more boats than usual in a flotilla on Saturday.
Abdul Kadae, the suspect who was detained on Saturday, is the first person to be arrested in connection to the blasts.
President Duterte is scheduled to meet US President Barack Obama at a regional summit in Laos on Tuesday.
Authorities believes the suspect to be a part of the KGR@Katibah GR, a group headed by Gigih Rahmat Dewa.
The two nuclear-armed neighbours have been moving to gradually ease long-existing tensions between them.
Officials say some of the injured were rushed to hospitals in provincial capital Qalat as well as neighbouring Kandahar province.
The Singapore Embassy officials in Malaysia are assisting the families of those injured.
The train blast comes a day after the peace talks between Thailand's military government and Muslim separatists.
Authorities say the tremor was felt in Butuan and Cagayan de Oro, major cities in north-eastern Mindanao.
Authorities say Typhoon Namtheun was heading north towards the southern main island of Kyushu with gusts of up to 198 kmh.