Over the course of the weekend, Indonesia’s second-largest city was devastated by a rash of suicide bombings, targeting three churches and a police headquarters.

The chaos began on Sunday, when a family of six splintered into separate groups and detonated explosives at three separate churches simultaneously, killing 13 people and injuring at least 43 more. Later that evening, in what’s been described as a “terror incident,” another bomb detonated prematurely, claiming the lives of a mother and her 17-year old daughter. Police shot and killed the family’s father shortly after they arrived at the scene and found him holding a detonator, CNN reports.

The following day, a family of five carried out a similar bombing at the Surabayan police headquarters, increasing the injury toll by an additional 10 people.

As authorities continue to search for answers, thousands have grieved publicly under the #PrayForIndonesia hashtag.

Here’s how you can get involved in the aftermath of the attacks

Alissa Wahid, the Founder and National Coordinator of Gusdurian Network, is collecting donations to ease the burden for those impacted by this series of bombings.

Additionally, you can keep abreast of continued efforts to curtail terrorist acts in Indonesia by supporting The Counterterrorism Extremist Project and the Ansor Youth Movement.

Because of the nature and location of of these attacks, additional relief efforts have been difficult to identify. But if you come across any other ways to help this community rebound from this tragedy, please let us know.