Jewish leaders arrested Peter and John, but many people became believers.

Acts 4:1-4

4 Meanwhile, in the temple courtyard, there were some priests, the officer who was in charge of the temple police, and also some [SYN] Sadducee sect members. These men came to Peter and John while the two of them were speaking to the people. 2 These men were very angry, because the two apostles were teaching the people about Jesus. What they were telling the people was that because ◄God caused Jesus to become alive again/God raised Jesus from the dead►, God would cause other people who had died to become alive again. 3 So those officials seized Peter and John. Then they put them in jail. They had to wait until the next day to question Peter and John, because it was already evening and it was contrary to their Jewish law to question people at night. 4 However, many people who had heard the message from Peter believed in Jesus. (OR, But many people had already believed in Jesus, because they had heard the message from Peter.) So the number of men who believed in Jesus increased to about five 5,000.